{
  "height": 94,
  "block_hash": "cc4ff2aebaa3bd2c017f29b94351aff8ca4c29477ec9768a8e0b0f512bb514f6",
  "status": "confirmed",
  "bitcoin_block_height": 972978,
  "digest": {
    "alg": "sha256",
    "hex": "cc4ff2aebaa3bd2c017f29b94351aff8ca4c29477ec9768a8e0b0f512bb514f6",
    "preimage": "block:{\"at\":\"2026-10-24T21:22:19.717Z\",\"entry_count\":1,\"first_seq\":97,\"height\":94,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":97,\"merkle_root\":\"d03b9f85012da353daef40b287b69e7b4cc96b91cd96e81c5a756f04d2201701\",\"prev_hash\":\"10b421b493c489b5dd10cd3380bed4ee44a0c890041b3099836cb42eb945ee16\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T21:26:48.983Z",
      "updated_at": "2026-10-24T22:38:37.669Z",
      "bitcoin_block_height": 972978,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add229af6a7797d957901b34a9c4fb9cee1d5f72a5f82db183c6fc9ab45729509d1d989e5289c16b6d0b8b3"
        },
        {
          "type": "bitcoin",
          "block_height": 972978,
          "merkle_root": "d210051f3445c39bbf32fb4497d94f03b1526298585065034c1aa7d28ddfd046"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T21:26:48.983Z",
      "updated_at": "2026-10-24T22:38:37.669Z",
      "bitcoin_block_height": 972978,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add229a6d072e14495f7fb217b6d97bc657fcd347d1de980eec821d312aae8cd32e1b2dfb6c05e7684f0296"
        },
        {
          "type": "bitcoin",
          "block_height": 972978,
          "merkle_root": "d210051f3445c39bbf32fb4497d94f03b1526298585065034c1aa7d28ddfd046"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T21:26:48.983Z",
      "updated_at": "2026-10-25T02:49:17.524Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add229ad5b3ffe0a2d8f7d5b356e6033cbabbaa91b1f732456e3c8a0acba0a317ed51eb93ffd7b3871f3757"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/94/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."
}