{
  "height": 36,
  "block_hash": "cd143293f30ae85e5bd8a8306435ec00b08fea5b88c2a36fb181bba0e62a6a47",
  "status": "confirmed",
  "bitcoin_block_height": 972955,
  "digest": {
    "alg": "sha256",
    "hex": "cd143293f30ae85e5bd8a8306435ec00b08fea5b88c2a36fb181bba0e62a6a47",
    "preimage": "block:{\"at\":\"2026-10-24T16:26:48.100Z\",\"entry_count\":1,\"first_seq\":38,\"height\":36,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":38,\"merkle_root\":\"771b58fd17b47e3d67777437455598593131b217eddabea11f37877ecc5d8d67\",\"prev_hash\":\"ca73f1e241eb6f79f128ccb7e798d523e44600ce063e2902fc1a19dbfc27f7d5\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T16:36:17.957Z",
      "updated_at": "2026-10-24T18:40:31.672Z",
      "bitcoin_block_height": 972955,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6adcde8382d7bff9bff9f8e0c5eefbd889e0259fdd94f19311905725fa4d7e9d1985cc75630a9ec46c6d0238"
        },
        {
          "type": "bitcoin",
          "block_height": 972955,
          "merkle_root": "3070b4b64d766acc6b8c2ec362acc3415aa2e07e9a5bc2e992ccd9c676ae577b"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T16:36:17.957Z",
      "updated_at": "2026-10-24T18:40:31.672Z",
      "bitcoin_block_height": 972955,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6adcde82a9c9c58277237855da455c0d2664555c82bf25334322c57ada7eb6d9c23dd3d3191cd10834c6ea64"
        },
        {
          "type": "bitcoin",
          "block_height": 972955,
          "merkle_root": "3070b4b64d766acc6b8c2ec362acc3415aa2e07e9a5bc2e992ccd9c676ae577b"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T16:36:17.957Z",
      "updated_at": "2026-10-24T19:53:06.806Z",
      "bitcoin_block_height": 972959,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6adcde8281ec2b0e026a5a7f34926a65abe322b03d7e89582ae142fa7590356d75c7c9b8f76f223af224f205"
        },
        {
          "type": "bitcoin",
          "block_height": 972959,
          "merkle_root": "b24f80d7cd4c29a7c0218013b1bbb0a729ae2ef53b720f465ca9c5b104743f66"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/36/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."
}