{
  "height": 107,
  "block_hash": "9ff0995084a2bb881fa5bb6c9feec2b68c9410e8f3f55ba628728529cba5db39",
  "status": "confirmed",
  "bitcoin_block_height": 972988,
  "digest": {
    "alg": "sha256",
    "hex": "9ff0995084a2bb881fa5bb6c9feec2b68c9410e8f3f55ba628728529cba5db39",
    "preimage": "block:{\"at\":\"2026-10-24T22:29:19.206Z\",\"entry_count\":1,\"first_seq\":110,\"height\":107,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":110,\"merkle_root\":\"1da0b5f4241b55e0c1a0c2fd6ac768b5263ddefb9b69db4154b74fc4d52947ca\",\"prev_hash\":\"3420309e4eb90ad53f19edf10018b87bba1f77b9af6bcdffa9009bb2dfbb3fc0\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:38:37.669Z",
      "updated_at": "2026-10-25T00:31:17.450Z",
      "bitcoin_block_height": 972988,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add336e996e8c36e0aaa5d6da4f7ed87d770a16aafd38348808720785f4da4cd77c3f64347abb0f67162efd"
        },
        {
          "type": "bitcoin",
          "block_height": 972988,
          "merkle_root": "3c587ddc5f28b4732a5eeb27216e13677e4348754375484a771cd576c6e70198"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:38:37.669Z",
      "updated_at": "2026-10-25T00:31:17.450Z",
      "bitcoin_block_height": 972988,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add336eb6ec7cf47adb6c74e2d56a72f6577225ff1f202a3717791a6529b7a7c3473c32c6a2bf00152b3936"
        },
        {
          "type": "bitcoin",
          "block_height": 972988,
          "merkle_root": "3c587ddc5f28b4732a5eeb27216e13677e4348754375484a771cd576c6e70198"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T22:38:37.669Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add336ebe5a603b94c0a7586f5c323420120e8693d85da665f63226637c1f8266e09e94dc95faf61cc5fc80"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/107/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."
}