{
  "height": 31,
  "block_hash": "41e07af25398215a6f23434034c8a162484b2d2244e2e9f22f40d47908a46889",
  "status": "confirmed",
  "bitcoin_block_height": 972955,
  "digest": {
    "alg": "sha256",
    "hex": "41e07af25398215a6f23434034c8a162484b2d2244e2e9f22f40d47908a46889",
    "preimage": "block:{\"at\":\"2026-10-24T15:58:44.901Z\",\"entry_count\":1,\"first_seq\":33,\"height\":31,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":33,\"merkle_root\":\"60a08637fc6a50df71313348951978e031e278e4ef2b987e89f619ab3788b574\",\"prev_hash\":\"648f79627f0ee917d830f92ea5e7be00135569447d900506b6f70f6842dc8cd0\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T16:03:14.735Z",
      "updated_at": "2026-10-24T18:43:36.793Z",
      "bitcoin_block_height": 972955,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6adcd6c49ecb5f5e0e62e958e76dce37fa736ed6b68ae94f62f66b3149ee165165fe9309d03491e9a5aa0754"
        },
        {
          "type": "bitcoin",
          "block_height": 972955,
          "merkle_root": "3070b4b64d766acc6b8c2ec362acc3415aa2e07e9a5bc2e992ccd9c676ae577b"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T16:03:14.735Z",
      "updated_at": "2026-10-24T18:43:36.793Z",
      "bitcoin_block_height": 972955,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6adcd6c4bf319c1e77d05b7274d728efe816b69e800144246f4e03459e7f78448b1eb2db9f3e5fa634851264"
        },
        {
          "type": "bitcoin",
          "block_height": 972955,
          "merkle_root": "3070b4b64d766acc6b8c2ec362acc3415aa2e07e9a5bc2e992ccd9c676ae577b"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T16:03:14.735Z",
      "updated_at": "2026-10-24T19:53:06.806Z",
      "bitcoin_block_height": 972959,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6adcd6c45e7a6c35a5114cf0d7c13cdbdee360af219bba04b0903c1259015497a6723745a1b660b3a37b0b11"
        },
        {
          "type": "bitcoin",
          "block_height": 972959,
          "merkle_root": "b24f80d7cd4c29a7c0218013b1bbb0a729ae2ef53b720f465ca9c5b104743f66"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/31/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."
}