{
  "v": 1,
  "requestId": "f716cd57-854b-4a52-8d24-e0b897f94c57",
  "chainId": 1,
  "window": {
    "toBlock": 26048184,
    "fromBlock": 26047886,
    "toBlockHash": "0xd02eeba314450d64ca2c9cd486efa4938ecbf71db6d9343ad84668f01fc9a028"
  },
  "answerType": "uint256",
  "answer": "420000",
  "figure": "420000",
  "definitions": {
    "answer": "the Bitcoin mainnet block height, as a number",
    "source": "Bitcoin.org, which lists the second halving at block 420,000 and the new reward as 12.5 BTC.",
    "missing": "The fact is established by the named public source; no missing value is assumed.",
    "subject": "The question is about the Bitcoin network and its history. The pinned chain and window timestamp the request only; the answer is not read from Ethereum.",
    "effect": "The block height listed for the second halving, when the reduced subsidy takes effect."
  },
  "recipe": {
    "kind": "panel",
    "source": "https://bitcoin.org/en/halving"
  },
  "notes": "Read Bitcoin.org's Halving history table: its Second halving row gives block 420,000 and new reward 12.5 BTC. The pinned Ethereum window (blocks 26047886–26048184, closing hash as copied above) is retained exactly as requested, but per the request's subject definition it only timestamps this off-chain historical fact and is not used to derive it."
}