{
  "height": 106,
  "block_hash": "3420309e4eb90ad53f19edf10018b87bba1f77b9af6bcdffa9009bb2dfbb3fc0",
  "status": "confirmed",
  "bitcoin_block_height": 972985,
  "digest": {
    "alg": "sha256",
    "hex": "3420309e4eb90ad53f19edf10018b87bba1f77b9af6bcdffa9009bb2dfbb3fc0",
    "preimage": "block:{\"at\":\"2026-10-24T22:24:19.134Z\",\"entry_count\":1,\"first_seq\":109,\"height\":106,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":109,\"merkle_root\":\"349f353b38bf2676f84cf5e305b805c028b087b963cd65e9c1b169e1766d82ed\",\"prev_hash\":\"921228955cd9b1839e7caac69faefd0033a0d2945af53da5e508e1e6cf32e3cb\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:28:48.890Z",
      "updated_at": "2026-10-24T23:44:06.863Z",
      "bitcoin_block_height": 972985,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add3122fbd171ad81020b5594bfe5d683d86ffed42f9752c8725f4feb0ea9fab84d806e3f2fb8122e2fb603"
        },
        {
          "type": "bitcoin",
          "block_height": 972985,
          "merkle_root": "af454fa7def8d620c0d2607c1feed6f4405130c7e8d2985c6b9410af08c6095e"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:28:48.890Z",
      "updated_at": "2026-10-24T23:44:06.863Z",
      "bitcoin_block_height": 972985,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add3122c8e1399aa7de5c4b03ef4599fd651a111d576ea5d4f11ad74e5c783e625f47950e57667367b5fe42"
        },
        {
          "type": "bitcoin",
          "block_height": 972985,
          "merkle_root": "af454fa7def8d620c0d2607c1feed6f4405130c7e8d2985c6b9410af08c6095e"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:28:48.890Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add3123c0c25960ffcd95b509c8a0e6f2646b8033869a93ca1e08e9447fb6d6547bded630ea8c538c390a07"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/106/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."
}