{
  "height": 99,
  "block_hash": "cce16312b985bcac8919eac1f24cb90586a722fbd56183745e4528f4e69c4231",
  "status": "confirmed",
  "bitcoin_block_height": 972982,
  "digest": {
    "alg": "sha256",
    "hex": "cce16312b985bcac8919eac1f24cb90586a722fbd56183745e4528f4e69c4231",
    "preimage": "block:{\"at\":\"2026-10-24T21:47:52.532Z\",\"entry_count\":1,\"first_seq\":102,\"height\":99,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":102,\"merkle_root\":\"5472c3a062435c4e0f68c5100fe8835b4ef9149aaac6d606bea5cc5802fdba7b\",\"prev_hash\":\"1d7cce076f28227693e7dbd4a1dadcb3f7f44b1bfa5ff559d98b71e3ff4df9fa\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T21:57:22.443Z",
      "updated_at": "2026-10-24T23:44:06.863Z",
      "bitcoin_block_height": 972982,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add29c325ce4097f4a23f14ab8b9624f65a8551af13bbd62cbbbff1069b92a705ec1003a6c844d25c1f882a"
        },
        {
          "type": "bitcoin",
          "block_height": 972982,
          "merkle_root": "4c99dddccb05ff6394193624edeedc186bccaa073a9bcae6d83f1f485bcee966"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T21:57:22.443Z",
      "updated_at": "2026-10-24T23:44:06.863Z",
      "bitcoin_block_height": 972982,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add29c353782ad8b69277320fd41b95ed496a33ed1433219293d399d99c4c794fc24a3f3e51d66b8a558cac"
        },
        {
          "type": "bitcoin",
          "block_height": 972982,
          "merkle_root": "4c99dddccb05ff6394193624edeedc186bccaa073a9bcae6d83f1f485bcee966"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T21:57:22.443Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add29c2274b38f782f30b2a7c743c8845a3784217334cb51f70c6c8abdadff22b0f98d456e60f7a76a0f89f"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/99/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."
}