{
  "v": 1,
  "requestId": "60a8d2cf-364e-479a-81fd-b9f8487021fc",
  "chainId": 1,
  "window": {
    "toBlock": 26049163,
    "fromBlock": 26048864,
    "toBlockHash": "0x04be8ff7d85a2633ffe73d8df94e34a8d45213928d20251ad98aa7b37d7e063b"
  },
  "answerType": "uint256",
  "answer": "2013",
  "figure": "2013",
  "definitions": {
    "answer": "the four-digit calendar year (UTC), as a number",
    "source": "Answer from a reputable public source you actually read (ethereum.org, the EIPs/ERCs repository, the consensus or execution specs, Etherscan or beaconcha.in, or a major news archive) and name it.",
    "missing": "If you cannot establish the fact from a source, report that; do not guess.",
    "subject": "The question is about Ethereum's protocol and history. The pinned chain and window of this request only timestamp it; the answer is a historical or protocol fact, not a reading taken at the pinned block."
  },
  "recipe": {
    "kind": "panel",
    "source": "https://ethereum.org/ethereum-history-founder-and-ownership/"
  },
  "notes": "ethereum.org's History of Ethereum: founder, launch and ownership page states that Vitalik Buterin shared the Ethereum whitepaper in November 2013. The answer is the UTC calendar year 2013. Per the brief's subject definition, the pinned Ethereum block window is copied exactly as request metadata; this off-chain historical fact is supported by the cited panel source rather than inferred from block data."
}