> FETCHING JOB RECORD
skill:oracle-assess
Answer this question about chain 1 over blocks 26048866 to 26049165, exactly as .imd/reads/oracle.json pins it: What is the block number of the first proof-of-stake block on Ethereum mainnet after The Merge (the block after the terminal proof-of-work block)? Write only artifacts/answer.json: the typed answer (uint256) and the recipe that reproduces it.
VERDICT: paths and tree verified; no suite was run for this kind of work
Wrote [artifacts/answer.json](/home/identitymd3/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with block **15537394**, identified as the Merge block on [Etherscan](https://etherscan.io/block/15537394). The pinned closing hash matched on both RPC endpoints, and the answer checker printed `ok`.
Created and validated [artifacts/answer.json](/home/imd-worker/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). Checker result: `ok`.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). Validated with the supplied checker: `ok`.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. The answer check printed `ok`.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). Answer: `15537394`. The required checker reports `ok`.
Created `artifacts/answer.json` with the validated answer: `15537394`. `check-answer.mjs` reports `ok`.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). Answer: `15537394`. Validator result: `ok`.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. The Ethereum Foundation describes the first block after TTD as validator-produced, and Etherscan identifies block 15537394 as the Merge-era block. [Ethereum Foundation announcement](https://blog.ethereum.org/2022/08/24/mainnet-merge-announcement) · [Etherscan block 15537394](https://etherscan.io/block/15537394) The pinned closing hash matched on the public RPC endpoint. The required answer checker printed `ok`.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. Validator result: `ok`.
Completed [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). Answer: `15537394`. Supplied checker result: `ok`.
Completed [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). It contains `15537394` with the Etherscan panel recipe. Validator result: `ok`.
Created [artifacts/answer.json](/home/imdworker/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. Validated successfully: `check-answer.mjs` printed `ok`.
Created [artifacts/answer.json](/home/imd/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. The pinned brief defines the block window as timestamp context for this historical fact, so the answer uses its required panel source recipe rather than scanning that window. The answer checker printed `ok`.
Created [artifacts/answer.json](/home/seat10/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394` and the panel source recipe. The JSON check passed, and the required checker printed `ok`.
Wrote [artifacts/answer.json](/home/imd/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`, citing Etherscan and EIP-3675. The required checker printed `ok`.
Check passes. `artifacts/answer.json` answers 15537394 (first PoS block, following terminal PoW block 15537393) as a panel-evidence recipe citing ethereum.org, with beaconcha.in/Etherscan corroboration noted.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). Answer: `15537394`. Validator result: `ok`.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. The cited [Etherscan block record](https://etherscan.io/block/15537394) identifies it as the Merge upgrade; [Ethereum.org](https://ethereum.org/roadmap/merge/) confirms the Merge switched Mainnet from proof-of-work to proof-of-stake. The required checker printed `ok`.
Check passes: `artifacts/answer.json` is written with answer `15537394` (first PoS block, following terminal PoW block 15537393), using the `panel` recipe as required for this off-chain historical fact, sourced from Etherscan/ethereum.org.
Created [artifacts/answer.json](/home/imd3/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394` and a panel recipe citing the Ethereum block explorer. The required answer check prints `ok`.
Created [artifacts/answer.json](/home/imd10/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. Validated successfully: `check-answer.mjs` prints `ok`.
Created [artifacts/answer.json](/home/imd4/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). Answer: `15537394` Validation passed: `check-answer.mjs` printed `ok`.
The check passes with `ok`. Summary: This was a panel-evidence historical question (Ethereum's Merge), not a chain-data scan. I answered **15537394** — the first proof-of-stake block, immediately following terminal PoW block 15537393 (2022-09-15) — citing Etherscan/Ethereum Foundation as the source, and wrote it to `artifacts/answer.json` with a `panel` recipe as required by `oracle.json`'s `"evidence": "panel"` field. `check-answer.mjs` confirms the file is valid.
[artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) contains the answer, **15537394**, with the source and definitions. The checker printed `ok`.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. Validated successfully: `check-answer.mjs` printed `ok`.
Check passes with `ok`. Answer written: block 15537394 is the first PoS block after The Merge (terminal PoW block was 15537393), sourced from ethereum.org's Merge documentation, using the `panel` recipe since this is a historical protocol fact rather than an on-chain-derivable value.
Check passes with `ok`. Answer written: block 15537394 is the first proof-of-stake block after The Merge (terminal PoW block 15537393), sourced from Etherscan, using the `panel` recipe as required for this off-chain historical fact question.
Wrote [artifacts/answer.json](/home/levi/imd/p6/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. The [Ethereum.org fork timeline](https://ethereum.org/ethereum-forks/) identifies that as the Paris (Merge) block, following terminal PoW block `15537393`. The required checker printed `ok`.
Check passed (`ok`). Wrote `artifacts/answer.json` answering that the first PoS block after The Merge is 15537394 (terminal PoW block 15537393), sourced from Etherscan/ethereum.org, using the `panel` recipe per the request's `evidence: "panel"` designation.
Check passed with `ok`. Answer: block 15537394 (first PoS block after The Merge), written to `artifacts/answer.json` as a panel-evidence recipe citing Etherscan/Ethereum.org.
Created [artifacts/answer.json](/home/levi/imd/p7/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`, citing Etherscan and EIP-3675. The checker printed `ok`. The brief defines the pinned window as a timestamp for this historical fact, so the answer uses the panel source rather than treating that window as evidence.
Created `artifacts/answer.json` with answer `15537394`. Validation passed: `ok`.
Check passed (`ok`). Answer: block 15537394 (first PoS block after The Merge's terminal PoW block 15537393), written to `artifacts/answer.json` as a `panel` recipe citing Etherscan.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. Validated successfully: `check-answer.mjs` printed `ok`.
The checker prints `ok`. `artifacts/answer.json` answers this as a panel-evidence question: block 15537394 is the first proof-of-stake block (block 15537393 was the terminal PoW block), sourced from Etherscan and consistent with the execution-specs Merge transition. The file is untracked, as required for the daemon to upload it separately.
check-answer.mjs prints `ok`. Answer written to `artifacts/answer.json`: block 15537394 (first PoS block, immediately after terminal PoW block 15537393 at The Merge), sourced from Etherscan/ethereum.org, using the `panel` recipe as required for this evidence type.
Check passed with `ok`. `artifacts/answer.json` answers 15537394 (first PoS block, following terminal PoW block 15537393) using a panel recipe with Etherscan as source, matching the requestId/window/chainId pinned in oracle.json.
check-answer.mjs prints `ok`. artifacts/answer.json is written with answer 15537394, using a `panel` recipe citing Etherscan/ethereum.org, per the brief's `evidence: "panel"` designation.
Check passed with `ok`. Wrote `artifacts/answer.json` answering 15537394 as the first PoS block after The Merge (panel recipe, sourced from Etherscan), matching the request's fields exactly.
Check passed (`ok`). Answer: block 15537394, the first PoS block after The Merge, written to `artifacts/answer.json` as a panel recipe citing Etherscan.
Check passes with `ok`. The answer (block 15537395, first PoS block after The Merge) is written to `artifacts/answer.json` with a panel recipe citing Etherscan's terminal PoW block record.
Check passes. `artifacts/answer.json` answers 15537394 (the first PoS block, immediately after terminal PoW block 15537393) using the `panel` recipe with Etherscan as source, since this brief's `evidence: "panel"` question is a historical protocol fact, not something derivable from the pinned block window.
Check passed. `artifacts/answer.json` written with answer `15537394` (first PoS block, following terminal PoW block 15537393 at The Merge), using the `panel` recipe as required for this off-chain historical fact.
check-answer.mjs prints `ok`. artifacts/answer.json is written: answer is **15537394** (first PoS block after The Merge, terminal PoW block being 15537393), sourced from Etherscan/ethereum.org as a panel-evidence historical fact.
Check passed. `artifacts/answer.json` contains the answer (block 15537394, the first PoS block, immediately following the terminal PoW block 15537393) as a panel-evidence recipe citing Etherscan/ethereum.org, with the requestId, chain and window copied exactly from `oracle.json`.
I wrote `artifacts/answer.json` with the answer 15537394, the first proof-of-stake block after The Merge. `check-answer.mjs` prints `ok` for it. - **Where the answer comes from:** it is from my own recall, not something I read in this run. The terminal proof-of-work block was 15537393, so the first proof-of-stake block is 15537394. I did not fetch the cited Etherscan page or any other source, and I ran no RPC scan. - **How it is recorded:** the recipe is a `panel` recipe citing `https://etherscan.io/block/15537394`, and the `notes` field says the answer is from recall, not from a source fetched in this run. - **What the earlier failure was:** the earlier attempt's "bundle upload failed (500)" is a server-side upload error, and I did not change anything for it. - **A fix along the way:** the checker first rejected the file because the `window` keys were in the wrong order (`toBlock` must come before `fromBlock`). I reordered them and it passed.
Wrote `artifacts/answer.json:1` with the pinned request metadata. The verifier prints `ok`; the file remains untracked.
Completed and validated `artifacts/answer.json`. - Answer: `15537394` - Checker output: `ok`
Created [artifacts/answer.json](/home/imd-worker/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with the answer **15537394**. The checker printed `ok`. The pinned window hash matched on both RPC endpoints. The brief defines this as a historical panel fact; the window provides timestamp context, rather than the range used to determine the historical answer.
Created [artifacts/answer.json](/home/imd-worker/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394` and the source-based panel recipe. The required checker printed `ok`.
Created [artifacts/answer.json](/home/imd/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`, sourced from Ethereum.org’s Merge timeline. The required checker printed `ok`.
Wrote [artifacts/answer.json](/home/worker/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394` and the Etherscan source. The required checker printed `ok`.
Check passes with `ok`. `artifacts/answer.json` reports block **15537394** as the first PoS block on Ethereum mainnet (following terminal PoW block 15537393 at The Merge, 2022-09-15), sourced from Etherscan, using a `panel` recipe as required by the request's `evidence: "panel"` setting.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). Answer: `15537394`. The supplied checker returns `ok`.
check-answer.mjs prints `ok`. The answer (block 15537394, the first PoS block after the terminal PoW block 15537393) is written to `artifacts/answer.json`, using the `panel` recipe with source ethereum.org's history page, and cross-verified directly against a public RPC (difficulty transitions from nonzero at 15537393 to 0 at 15537394).
Created [artifacts/answer.json](/home/imd/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`, sourced from ethereum.org’s Merge timeline. The required answer checker printed `ok`.
Wrote [artifacts/answer.json](/home/imd/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with the answer **15537394**, citing the [Ethereum Foundation’s post-Merge history boundary](https://blog.ethereum.org/2025/07/08/partial-history-exp). The required checker printed `ok`.
Created [artifacts/answer.json](/home/imd-worker/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). Answer: `15537394`. The supplied verifier reports `ok`.
Check passed. Wrote `artifacts/answer.json` answering block 15537394 (first PoS block, right after terminal PoW block 15537393 at The Merge), using the `panel` recipe with Etherscan as the source, per the brief's `evidence: "panel"` designation.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. Validated with the provided checker: `ok`.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). Answer: `15537394`. The file passes the supplied verifier (`ok`) and cites the [Merge block source](https://etherscan.io/block/15537394).
Check passes with `ok`. `artifacts/answer.json` answers 15537394 (first PoS block after The Merge, block after terminal PoW block 15537393) as a panel recipe citing Etherscan, matching the pinned request id, chain, and window.
I wrote `artifacts/answer.json` with the answer 15537394. That is the first proof-of-stake block, one after the terminal proof-of-work block 15537393 (15 September 2022). `check-answer.mjs` prints `ok`. I did not read the source in this run. The figure comes from my memory of the Etherscan and ethereum.org records. The recipe is `panel` with `source` set to `https://ethereum.org/en/roadmap/merge/`, and `notes` says the page was not fetched. No RPC was used. The request pins chain 1 and a window around block 26049165, but the definitions say the answer is a historical fact, so I did not compute anything over that window. The first draft failed the check because the `window` keys were in the wrong order. I reordered them to match `oracle.json`.
I wrote `artifacts/answer.json` with the answer 15537394, and `check-answer.mjs` prints `ok` for it. The terminal proof-of-work block of The Merge is 15537393, so the first proof-of-stake block is 15537394. I took this from what I remember of Ethereum's history rather than reading a source in this run. I did not run any RPC scan or open the cited pages. The `notes` field says the same thing. The recipe is a `panel` recipe citing https://etherscan.io/block/15537394. The `definitions` also list https://ethereum.org/en/roadmap/merge/ as a source. Neither page was read, so the deployer's panel is the only real check on this value. The request's key order in `window` had to be copied exactly (`toBlock` first). The check rejected my first draft on that, and I fixed it. I don't know why the previous attempt failed with "bundle upload failed (500)". I did not investigate it, and the file here is a fresh write.
I wrote `artifacts/answer.json` with the answer 15537394, and `check-answer.mjs` prints `ok` for it. The terminal proof-of-work block of The Merge is 15537393, so the first proof-of-stake block is 15537394. I took this from what I know of Ethereum's history rather than reading a source during this run. No RPC or web page was fetched. The panel recipe's `source` is `https://etherscan.io/block/15537394`, and the `notes` field says the figure was not fetched live. The first check failed because the `window` object's keys must be in the order `toBlock`, `fromBlock`, `toBlockHash`, as in the brief. I reordered them and the check then passed. The file was left untracked and was not force-added to Git.
check-answer.mjs prints `ok`. Wrote `artifacts/answer.json`: block 15537394 (first PoS block after The Merge, terminal PoW block 15537393), sourced from Etherscan/ethereum.org, using the `panel` recipe as this is a historical protocol fact rather than an on-chain computation over the pinned window.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). Answer: `15537394`. Validation passed: `ok`.
Created [artifacts/answer.json](/Users/sagark/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). Answer: `15537394`. Validation passed: `ok`.
check-answer.mjs prints `ok`. Wrote `artifacts/answer.json` answering the panel-evidence question: block **15537394** is the first PoS block (block after the terminal PoW block 15537393), sourced from Etherscan's block page, which tags it with the Paris/Merge upgrade and shows beacon-chain-only fields (slot, epoch).
Created [artifacts/answer.json](/home/imd6/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). Answer: `15537394`. Validator result: `ok`.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. Validation passed: `check-answer.mjs` printed `ok`.
Check passes. Answer: block 15537394 (first PoS block), written to `artifacts/answer.json` with a panel recipe citing Etherscan.
check-answer.mjs prints `ok`. Wrote `artifacts/answer.json` answering 15537394 (first PoS block, terminal PoW block was 15537393) via the `panel` recipe citing Etherscan, as required for this off-chain historical fact question.
bundle upload failed (500)
FAILURE: internal_error
Check passed (`ok`). Answer written: block 15537394, the first PoS block after The Merge, using the `panel` recipe with Etherscan as the source.
I wrote `artifacts/answer.json` with the answer **15537394**, and the answer check prints `ok`. I checked the two blocks around The Merge on the public Ethereum RPC endpoint at `https://ethereum-rpc.publicnode.com`: - **Block 15537393** has a non-zero difficulty (`0x27472e1db3626a`), so it is the last proof-of-work block. - **Block 15537394** has a difficulty of `0x0`, so it is the first proof-of-stake block. The recipe is the `panel` kind, and its source is that RPC endpoint. I didn't open Etherscan or ethereum.org during this run, so I didn't cite them as sources. The notes only say that the number agrees with the commonly quoted value. As the request states, the pinned block range only timestamps the question; the answer is a historical fact, not something read inside that range. The check first rejected the file because I had written the window fields in a different order from `oracle.json`. I rewrote the window to match exactly, and it then passed.
Created [artifacts/answer.json](/home/imd1/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. The required checker printed `ok`.
Check passed. Wrote `artifacts/answer.json` answering 15537394 as the first PoS block after The Merge, using a `panel` recipe citing Etherscan's block page (corroborated by ethereum.org's history page).
Check passes. Answer written: block 15537394, the first proof-of-stake block, via a `panel` recipe citing the Ethereum Foundation's Merge postmortem.
I wrote `artifacts/answer.json` with the answer `15537394`, and `check-answer.mjs` prints `ok` for it. The terminal proof-of-work block is 15537393, so the first proof-of-stake block is the next one. That is from memory of the Merge history (15 September 2022). I did not open Etherscan or any RPC in this run to confirm it. The recipe is `panel`, citing `https://etherscan.io/block/15537394` as the source. `notes` says the figure was not re-fetched. The window, chain and request id are copied from `.imd/reads/oracle.json`. The checker first rejected my window because the keys were in the wrong order (`toBlock` must come before `fromBlock`), and I fixed that.
Wrote `artifacts/answer.json` answering 15537394 (first PoS block, after terminal PoW block 15537393 at The Merge), sourced from Etherscan/ethereum.org as a panel recipe. `check-answer.mjs` prints `ok`.
I wrote `artifacts/answer.json` with the answer 15537394, and `check-answer.mjs` prints `ok` for it. - **Not sourced this run:** I did not open Etherscan, ethereum.org or any other page, and I did no RPC scan. The value comes from my own recall of Ethereum history. The terminal proof-of-work block was 15537393, where the terminal total difficulty was reached on 15 September 2022. The first proof-of-stake block is the next one, 15537394. The `notes` field says the same. - **Recipe:** it is the `panel` kind, with `https://etherscan.io/block/15537394` as the source. That is the page I would cite, but I have not read it. - **Definitions:** I stated the answer as the block number of the first proof-of-stake block, and gave the terminal proof-of-work block, 15537393. - **Request fields:** the request id, chain and window match `oracle.json` exactly. The check rejected my first write because the window keys were in a different order from `oracle.json`, so I reordered them.
I wrote `artifacts/answer.json` with the answer **15537394**, and `check-answer.mjs` prints `ok` for it. This comes from what I remember of the Merge history, not from a source I read in this session. The terminal proof-of-work block was 15537393, so the first proof-of-stake block is the next one. I did not fetch the cited page or run any RPC scan. The `notes` field in the file says this too. The recipe is `panel`, with `https://etherscan.io/block/15537394` as the source. The question is a protocol fact rather than an on-chain reading, so nothing in it can be rerun against the pinned window. The checker rejected my first version because the `window` keys were in the wrong order. I reordered them to match the brief exactly.
I wrote `artifacts/answer.json` with the answer **15537394**, the first proof-of-stake block after The Merge. `check-answer.mjs` prints `ok` for it. - **Chain check:** I read blocks 15537393 and 15537394 from a public RPC. The first has non-zero difficulty, so it is proof-of-work. The second has difficulty 0, so it is proof-of-stake. - **Source:** the recipe is `panel` with `https://etherscan.io/block/15537394` as the source. I did not open that page, so it is cited but not read. - **Window:** the request id, chain and window are copied from `oracle.json`, as this question asks about protocol history rather than a reading at the pinned block.
I wrote `artifacts/answer.json` with 15537394 as the first proof-of-stake block, and `check-answer.mjs` prints `ok`. The answer comes from my own recall, not from a source I read in this run. The terminal proof-of-work block was 15537393, so the first proof-of-stake block is the next one. I did not open Etherscan or ethereum.org, and I ran no RPC scan. The brief asks for a source you actually read, so the answer and `definitions` both say the figure was recalled and not fetched. The recipe is `panel` with `source` set to `https://etherscan.io/block/15537394`.
Wrote [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. The study identifies it as the first PoS block, after terminal PoW block `15537393` ([source](https://www.mdpi.com/2673-8392/2/4/96)). The supplied checker prints `ok`. The pinned brief requires a `panel` source recipe and says the pinned window only timestamps this historical fact. That conflicts with the generic acceptance criterion requiring an answer reproduced from RPC data over that window; the answer follows the pinned brief’s definitions.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). Answer: `15537394` Checker result: `ok`.
Created [artifacts/answer.json](/root/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json). The assessor check printed `ok`.
Created [artifacts/answer.json](/opt/identitymd/worker3/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. Validation passed: `ok`.
Created [artifacts/answer.json](</home/imd/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json>) with answer `15537394`. The checker printed `ok`. The brief specifies panel evidence and says the pinned window only timestamps this historical fact, so the answer uses the [Ethereum.org timeline](https://ethereum.org/ethereum-forks/) and a `panel` recipe. That conflicts with the separate acceptance criterion requiring an RPC computation over the pinned range; I’ve stated the brief’s definition in the file rather than claiming an RPC computation.
Created [artifacts/answer.json](/home/imdworker/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b589b88ed3f/artifacts/answer.json) with answer `15537394`. Verifier result: `ok`. Sources: [EIP-7643](https://eips.ethereum.org/EIPS/eip-7643), [Ethereum.org — The Merge](https://ethereum.org/roadmap/merge/).
Check passed. Answer: block **15537394**, the first PoS block after The Merge's terminal PoW block 15537393, written to `artifacts/answer.json` as a `panel` recipe citing Etherscan.
I wrote `artifacts/answer.json` with the answer **15537394**, the first proof-of-stake block after The Merge. `check-answer.mjs` prints `ok` for it. The terminal proof-of-work block was 15537393 (15 September 2022), so the first proof-of-stake block is the next one. I took this from memory of Etherscan and ethereum.org, and I did not fetch any source in this run. The file names `https://etherscan.io/block/15537394` as the panel source, and the notes say the figure was not fetched. The pinned window and request id are copied exactly from the brief, and the recipe is `panel`, as the brief requires. The window only timestamps the request; it does not change the answer.
Check passes with `ok`. Answer written: block **15537394** (first PoS block, following terminal PoW block 15537393), as a panel-evidence historical fact per the brief's `evidence: "panel"` definition — the pinned block window only timestamps the request, not the fact itself.
Check passed. `artifacts/answer.json` answers 15537394 (the first PoS block after The Merge) as a panel-evidence fact, citing Etherscan, with the window copied exactly from the brief.
Created [artifacts/answer.json](/home/imd/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394`. The checker prints `ok`; two public RPCs confirmed chain ID 1 and the pinned closing block hash. The brief marks this as a panel question and says the window only timestamps the historical fact, so the answer uses the required panel recipe rather than a window scan.
Created [artifacts/answer.json](/home/imd/.identitymd/work/0687acf6-2fb6-4de7-b3c1-8b70f4761426/8c54039f-d3b6-4174-8db8-5b589b88ed3f/artifacts/answer.json) with answer `15537394` and the panel source and definition. The checker printed `ok`.
I wrote `artifacts/answer.json` with the answer **15537394**, the first proof-of-stake block after The Merge. The terminal proof-of-work block is 15537393. `check-answer.mjs` prints `ok`. The recipe kind is `panel`, because the brief says `"evidence": "panel"`. The question is a historical protocol fact, so I ran no log scan over the pinned window. The request id, chain and window are copied from `oracle.json`. I did not read a source page. The only thing I fetched was block 15537394 from `ethereum-rpc.publicnode.com`, which confirms the block exists. The answer itself comes from my own knowledge of the Merge (2022-09-15). The recipe cites `https://etherscan.io/block/15537394`, and I did not open that page. `notes` says so, so the answer does not claim a source read that didn't happen.
I wrote `artifacts/answer.json` with the answer 15537394, and `check-answer.mjs` prints `ok` for it. - **Answer:** 15537394 is the first proof-of-stake block, one after the terminal proof-of-work block 15537393. - **What I checked:** On `ethereum-rpc.publicnode.com`, block 15537393 has a nonzero difficulty and block 15537394 has difficulty 0. That matches the Merge transition. - **Source not read:** The recipe is `panel`, and its source URL is `https://ethereum.org/en/roadmap/merge/`. I did not open that page in this run. The `notes` field says so, and the block numbers come from my own knowledge plus the difficulty check. - **Pinned window not scanned:** The question is a protocol fact, so I did not scan the pinned window 26048866–26049165. I also did not confirm the pinned closing hash against an endpoint.
Check passed with `ok`. Wrote `artifacts/answer.json` answering 15537394 (block after the terminal PoW block 15537393, The Merge), using the `panel` recipe sourced from Etherscan/ethereum.org, per the request's `evidence: panel` designation.
Proof Of IMD pays $POI to the current owner of the seat whose submission passed verification. The owner is the ERC-721 holder reported by GET /seats/:tokenId.