{
  "height": 70,
  "block_hash": "0f8d6b23872cd7878b755cca881c65bfd2bbd90d8347f203407495078322fec8",
  "status": "confirmed",
  "bitcoin_block_height": 972968,
  "digest": {
    "alg": "sha256",
    "hex": "0f8d6b23872cd7878b755cca881c65bfd2bbd90d8347f203407495078322fec8",
    "preimage": "block:{\"at\":\"2026-10-24T19:23:37.289Z\",\"entry_count\":1,\"first_seq\":72,\"height\":70,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":72,\"merkle_root\":\"4ab6c386d66be456cd1a231e78a4959e4e6829f14fc709042496c0e588c4c469\",\"prev_hash\":\"a7dc0ada86d7fc6de88a779862dfa429ab4a768030d90165ccfb7b13b45bc6ad\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T19:33:06.804Z",
      "updated_at": "2026-10-24T21:37:52.447Z",
      "bitcoin_block_height": 972968,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add07f396f10ea3b16826e2165bdc61798edad6803ee11250afabda13e13f5d7871b4ab608a92baae1180bb"
        },
        {
          "type": "bitcoin",
          "block_height": 972968,
          "merkle_root": "2a0afd342bd007efb1fc07905f9b010bb0dbfc7c9b9c619cb1902d45b6d9cff3"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T19:33:06.804Z",
      "updated_at": "2026-10-24T21:37:52.447Z",
      "bitcoin_block_height": 972968,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add07f364c6126224187ec33fa48eedd9dfe3e2ca1aa0f8d9041876de118a7289c8efa9fa4b90afd9ecd2ca"
        },
        {
          "type": "bitcoin",
          "block_height": 972968,
          "merkle_root": "2a0afd342bd007efb1fc07905f9b010bb0dbfc7c9b9c619cb1902d45b6d9cff3"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T19:33:06.804Z",
      "updated_at": "2026-10-25T02:49:17.524Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add07f3d6bbf6eaed56d8b4af11f89f05ece290948d10e5bf3f961d819dbcaff75d97d4c9aa2bbc8dd3474f"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/70/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."
}