{
  "height": 24,
  "block_hash": "71201f58bd9113a49d386f8f596bbe5832bad37b5d590281b7d3d2e4e309666d",
  "status": "confirmed",
  "bitcoin_block_height": 972909,
  "digest": {
    "alg": "sha256",
    "hex": "71201f58bd9113a49d386f8f596bbe5832bad37b5d590281b7d3d2e4e309666d",
    "preimage": "block:{\"at\":\"2026-10-24T09:38:59.506Z\",\"entry_count\":1,\"first_seq\":26,\"height\":24,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":26,\"merkle_root\":\"83cecd12f2bc075c16de02fc84b00ae28f4934d77a00b9b43ad203eb2fac38a6\",\"prev_hash\":\"86179368de786069e73853562a18956f95a72bf87f662db1906fa86c5ab2235a\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T09:43:42.450Z",
      "updated_at": "2026-10-24T11:43:42.475Z",
      "bitcoin_block_height": 972909,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6adc7dcfce20fe90e53ff9364c9908cdd760d19722a277dd6e05d03a04beb03d9aeddfb44a09320ddb62fe75"
        },
        {
          "type": "bitcoin",
          "block_height": 972909,
          "merkle_root": "80a4f756813bd3a64ea02fbcb678c4bc552446c02082551fe05e431d154e1759"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T09:43:42.450Z",
      "updated_at": "2026-10-24T11:43:42.475Z",
      "bitcoin_block_height": 972910,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6adc7dcf400b84bcd8beafe5973c211203a1910bdf71a0cb6dfa87e8a24e909bd785b06887c597fa1dc1d9e1"
        },
        {
          "type": "bitcoin",
          "block_height": 972910,
          "merkle_root": "62a1dd40453d76a7ed81360d119b18db6a3a7871820c412b940c5a3f26498d99"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T09:43:42.450Z",
      "updated_at": "2026-10-24T11:43:42.475Z",
      "bitcoin_block_height": 972911,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6adc7dcfe6d8c3c9d13d2d4176e59421331db55a81dc7dc08bc637f89cc198d8f3bdb56dc45fc83a36660dd1"
        },
        {
          "type": "bitcoin",
          "block_height": 972911,
          "merkle_root": "af384043069b917afbadf259a575899e396392fd31d7a1ae89c5912c49549f08"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/24/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."
}