{
  "height": 105,
  "block_hash": "921228955cd9b1839e7caac69faefd0033a0d2945af53da5e508e1e6cf32e3cb",
  "status": "confirmed",
  "bitcoin_block_height": 972985,
  "digest": {
    "alg": "sha256",
    "hex": "921228955cd9b1839e7caac69faefd0033a0d2945af53da5e508e1e6cf32e3cb",
    "preimage": "block:{\"at\":\"2026-10-24T22:19:19.108Z\",\"entry_count\":1,\"first_seq\":108,\"height\":105,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":108,\"merkle_root\":\"b8abc315711cb7bfa5a1811d255fc054382c186d2c5c40ddf7a0876aedd2fbed\",\"prev_hash\":\"79d30eb0c5d2315f9237183a6ea263628ad58394769776ff6fe1cbfdfc57ef90\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:28:48.890Z",
      "updated_at": "2026-10-24T23:44:06.863Z",
      "bitcoin_block_height": 972985,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add31218b186a5203bb8af0c7efee654cabfcb853f7f30d0f0ca1aa4efc0e81ba0b3a2fff5ecd8364434a07"
        },
        {
          "type": "bitcoin",
          "block_height": 972985,
          "merkle_root": "af454fa7def8d620c0d2607c1feed6f4405130c7e8d2985c6b9410af08c6095e"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:28:48.890Z",
      "updated_at": "2026-10-24T23:44:06.863Z",
      "bitcoin_block_height": 972985,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add312170307ec1b0955c0a15f09e2aabe538f0cc41fec5196b64cb9c5594ab684f7abaa3d6bdf34c4f92bd"
        },
        {
          "type": "bitcoin",
          "block_height": 972985,
          "merkle_root": "af454fa7def8d620c0d2607c1feed6f4405130c7e8d2985c6b9410af08c6095e"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:28:48.890Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add3122198ffcbcffeeaa4fb8ac940c123acc6f2321cb1f1798003cb2b138d9985d8bb5034d910f396221f2"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/105/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."
}