{
  "height": 82,
  "block_hash": "07d3764811fabd7cc11c30cdde9882fbee7937f2087f18534393ce5a8e7a7640",
  "status": "confirmed",
  "bitcoin_block_height": 972973,
  "digest": {
    "alg": "sha256",
    "hex": "07d3764811fabd7cc11c30cdde9882fbee7937f2087f18534393ce5a8e7a7640",
    "preimage": "block:{\"at\":\"2026-10-24T20:21:19.100Z\",\"entry_count\":1,\"first_seq\":85,\"height\":82,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":85,\"merkle_root\":\"3404825e2a8ce076a53105c4d3201e5bd22c7a5b5e0af1ec8d2a736544701454\",\"prev_hash\":\"1414e24393ca8eba6221b59c32827eddcfbd523f36570897d11de33827908cf2\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T20:30:48.846Z",
      "updated_at": "2026-10-24T21:36:48.984Z",
      "bitcoin_block_height": 972973,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add15796d7c100764da24ecf88f1cf5d6c73f37cffbaf2d0edea53ad4a686af62e05b6d4049bfe56d2a2a50"
        },
        {
          "type": "bitcoin",
          "block_height": 972973,
          "merkle_root": "7b962d9bb24a2e8b06223bcd5ecb1acb34654eceb4c36cc585ac7759f02ed4e0"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T20:30:48.846Z",
      "updated_at": "2026-10-24T21:36:48.984Z",
      "bitcoin_block_height": 972973,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add15795698c857fb94087e065827c2bd22e042b8347f0d709d54e977d7f041f44769247e33826b6818be9f"
        },
        {
          "type": "bitcoin",
          "block_height": 972973,
          "merkle_root": "7b962d9bb24a2e8b06223bcd5ecb1acb34654eceb4c36cc585ac7759f02ed4e0"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T20:30:48.846Z",
      "updated_at": "2026-10-25T02:49:17.524Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add1579eed6a3df0ceb4d5e7dc871bcbe88f801d9acce1615dc88935100aa769055b111ef1f9ddde725db14"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/82/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."
}