{
  "height": 33,
  "block_hash": "a2dd0414142f9a489a377157700362482a2f248c742adc90465a9f7d7a9891f8",
  "status": "confirmed",
  "bitcoin_block_height": 972955,
  "digest": {
    "alg": "sha256",
    "hex": "a2dd0414142f9a489a377157700362482a2f248c742adc90465a9f7d7a9891f8",
    "preimage": "block:{\"at\":\"2026-10-24T16:08:45.129Z\",\"entry_count\":1,\"first_seq\":35,\"height\":33,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":35,\"merkle_root\":\"516cb5471b2dec99ad07d06b39340bb094ac502e61915d9397ad46f4566c1098\",\"prev_hash\":\"41ff869675b3cce674b008390d3fb61c00c1da519fed333d07420b1176a7c341\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T16:13:14.712Z",
      "updated_at": "2026-10-24T18:43:36.793Z",
      "bitcoin_block_height": 972955,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6adcd91c11697ba5baaa433b7f92bf08a590b023bb6a2d7d0169288fd8e94d3c2b046c21a8105b785f5879b3"
        },
        {
          "type": "bitcoin",
          "block_height": 972955,
          "merkle_root": "3070b4b64d766acc6b8c2ec362acc3415aa2e07e9a5bc2e992ccd9c676ae577b"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T16:13:14.712Z",
      "updated_at": "2026-10-24T18:43:36.793Z",
      "bitcoin_block_height": 972955,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6adcd91cbe1831df851fd4845e96dfb80723746f84b58ed4c6e797c924f97dff817c3e91de21a3034c15bd70"
        },
        {
          "type": "bitcoin",
          "block_height": 972955,
          "merkle_root": "3070b4b64d766acc6b8c2ec362acc3415aa2e07e9a5bc2e992ccd9c676ae577b"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T16:13:14.712Z",
      "updated_at": "2026-10-24T19:53:06.806Z",
      "bitcoin_block_height": 972959,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6adcd91ceac6817a34be3bc6b612324fc19da8403359f5f2ab09486ec4d9a1fa239b845bf000a39b0132aef6"
        },
        {
          "type": "bitcoin",
          "block_height": 972959,
          "merkle_root": "b24f80d7cd4c29a7c0218013b1bbb0a729ae2ef53b720f465ca9c5b104743f66"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/33/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."
}