{
  "height": 69,
  "block_hash": "a7dc0ada86d7fc6de88a779862dfa429ab4a768030d90165ccfb7b13b45bc6ad",
  "status": "confirmed",
  "bitcoin_block_height": 972968,
  "digest": {
    "alg": "sha256",
    "hex": "a7dc0ada86d7fc6de88a779862dfa429ab4a768030d90165ccfb7b13b45bc6ad",
    "preimage": "block:{\"at\":\"2026-10-24T19:18:37.268Z\",\"entry_count\":1,\"first_seq\":71,\"height\":69,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":71,\"merkle_root\":\"1715ae4d56ed7e6aab605509ca9e3a797556bfc1f6b9418573353db50814a3c8\",\"prev_hash\":\"171ef9673ca5823951cd9e15f12600f7bd5392a0831ea640c9308da85be9b2c5\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T19:23:06.803Z",
      "updated_at": "2026-10-24T21:37:52.447Z",
      "bitcoin_block_height": 972968,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add059c7eef903e677677efb28fac2aea1fedaeb316b3757658b77bfe1f95f3cefa4dea869797dac2db197e"
        },
        {
          "type": "bitcoin",
          "block_height": 972968,
          "merkle_root": "2a0afd342bd007efb1fc07905f9b010bb0dbfc7c9b9c619cb1902d45b6d9cff3"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T19:23:06.803Z",
      "updated_at": "2026-10-24T21:37:52.447Z",
      "bitcoin_block_height": 972968,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add059c444731bd6637e7bf38b797fd7a86e6aaf5d2715646a5287a914dde27f71333f91cd52ac1b6bc03d6"
        },
        {
          "type": "bitcoin",
          "block_height": 972968,
          "merkle_root": "2a0afd342bd007efb1fc07905f9b010bb0dbfc7c9b9c619cb1902d45b6d9cff3"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T19:23:06.803Z",
      "updated_at": "2026-10-25T02:49:17.524Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add059cd512a6d83227a3d997195cfb64cc5719be845dc4e735b32821d4191ef38cb513471e3cb2e32232b3"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/69/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."
}