{
  "height": 3,
  "block_hash": "d9a472f122c7a6c113b4272fa3944cc7ccd0929613be70f525c88359618d73ce",
  "status": "confirmed",
  "bitcoin_block_height": 971434,
  "digest": {
    "alg": "sha256",
    "hex": "d9a472f122c7a6c113b4272fa3944cc7ccd0929613be70f525c88359618d73ce",
    "preimage": "block:{\"at\":\"2026-10-14T16:18:18.729Z\",\"entry_count\":1,\"first_seq\":5,\"height\":3,\"key_id\":\"key_f6a85f595bce8b9f\",\"last_seq\":5,\"merkle_root\":\"b800bea5b3306f9719a1ee682b262b47a92f11d89e1092dc1a64bbfa004b350d\",\"prev_hash\":\"e559b6290746f52a50d98b3a64253c2a3b88cca668146edb2eedbbc470a17aa5\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-14T16:19:03.569Z",
      "updated_at": "2026-10-14T18:36:05.912Z",
      "bitcoin_block_height": 971434,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6acfab78f20ae291e14abc03cd7ce030730f3969f8989549aabb41119fba14eb4e6c40e0b377f89edba7aaad"
        },
        {
          "type": "bitcoin",
          "block_height": 971434,
          "merkle_root": "8b95567a5e7230bd3bb7b1231c50d8f5902bc8adbc2411a75a2da0a6f9f70e4a"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-14T16:19:03.569Z",
      "updated_at": "2026-10-14T18:36:05.912Z",
      "bitcoin_block_height": 971434,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6acfab770473601c79be683951379a088b24c31a838d54034f0496d8575b9ed82b47c6cf2607bbafa0237f32"
        },
        {
          "type": "bitcoin",
          "block_height": 971434,
          "merkle_root": "8b95567a5e7230bd3bb7b1231c50d8f5902bc8adbc2411a75a2da0a6f9f70e4a"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-14T16:19:03.569Z",
      "updated_at": "2026-10-14T20:36:05.992Z",
      "bitcoin_block_height": 971452,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6acfab780e29efc688852c149394b74b1f69a35d3fa72458150ab5f4c5232c5f630df2e0acd1d8646e642d9e"
        },
        {
          "type": "bitcoin",
          "block_height": 971452,
          "merkle_root": "bb16b9046e4f11363c79a8ab588f23385aefea305764a24e3c13b31fd109e672"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/3/anchor.ots",
  "how_to_verify": "Download the .ots proof and run `ots verify -d <block_hash> <file>.ots` with the OpenTimestamps client, which checks the Bitcoin attestation against Bitcoin block headers. The digest is the block hash: sha256 of digest.preimage, the text \"block:\" followed by the canonical block header, which is the same header the issuer signs."
}