{
  "height": 45,
  "block_hash": "9cc476d2de0dc0b283ed8e100b31e9cf5357d7bcc6b456b9c5efe67eeefcddca",
  "status": "confirmed",
  "bitcoin_block_height": 972955,
  "digest": {
    "alg": "sha256",
    "hex": "9cc476d2de0dc0b283ed8e100b31e9cf5357d7bcc6b456b9c5efe67eeefcddca",
    "preimage": "block:{\"at\":\"2026-10-24T17:16:01.755Z\",\"entry_count\":1,\"first_seq\":47,\"height\":45,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":47,\"merkle_root\":\"218831ef5057e7c0874015cf0ad4f6ec088aba2750d1a3e3bb05af22f236d09d\",\"prev_hash\":\"cb3d3b2efab97a38f9a932969861803e4f00e5e03031e76590fa32eea78410fa\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T17:20:31.656Z",
      "updated_at": "2026-10-24T18:43:36.793Z",
      "bitcoin_block_height": 972955,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6adce8e14b84a8162b89f476ea139eec638d3cf2aaa79d7ed600eed685df5a1a619d4545657263d570346d2f"
        },
        {
          "type": "bitcoin",
          "block_height": 972955,
          "merkle_root": "3070b4b64d766acc6b8c2ec362acc3415aa2e07e9a5bc2e992ccd9c676ae577b"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T17:20:31.656Z",
      "updated_at": "2026-10-24T18:43:36.793Z",
      "bitcoin_block_height": 972955,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6adce8e0da49b211ce2ba56b09099acb3e9fe2cdb136ded28d511fd7d255fa8db6e0c2144fc87fca7a092d66"
        },
        {
          "type": "bitcoin",
          "block_height": 972955,
          "merkle_root": "3070b4b64d766acc6b8c2ec362acc3415aa2e07e9a5bc2e992ccd9c676ae577b"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T17:20:31.656Z",
      "updated_at": "2026-10-24T19:53:06.806Z",
      "bitcoin_block_height": 972959,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6adce8e084e449e7e8b8596f9fe4c48602d8db1448d0d5b9b81516a9df05b162e65b25d94707d17e5ce4b37c"
        },
        {
          "type": "bitcoin",
          "block_height": 972959,
          "merkle_root": "b24f80d7cd4c29a7c0218013b1bbb0a729ae2ef53b720f465ca9c5b104743f66"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/45/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."
}