{
  "height": 141,
  "block_hash": "1a45da3a9a9588f27802e2e506ab27dfec1035927b6382b5a73e5be6ef4abe9c",
  "status": "confirmed",
  "bitcoin_block_height": 973001,
  "digest": {
    "alg": "sha256",
    "hex": "1a45da3a9a9588f27802e2e506ab27dfec1035927b6382b5a73e5be6ef4abe9c",
    "preimage": "block:{\"at\":\"2026-10-25T01:21:18.746Z\",\"entry_count\":2,\"first_seq\":153,\"height\":141,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":154,\"merkle_root\":\"e7ab710562f5925aa84afac09171b0e3efff850f88c61666103c55d48bd206c8\",\"prev_hash\":\"858b0e93487d649ad17894e8c84e502cfb72abb498a9fb4089d06e88855fb6b7\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T01:30:47.444Z",
      "updated_at": "2026-10-25T03:13:01.807Z",
      "bitcoin_block_height": 973001,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add5bc712693363251e86da2f3bdbfd324e732407c9b1008344dd9ec58fae016d8b7ef044f048a7f5b1e021"
        },
        {
          "type": "bitcoin",
          "block_height": 973001,
          "merkle_root": "7523ceb63fadcaf8408d48fb7985b756a5380aa791b1c4b4c0859bc661126d19"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T01:30:47.444Z",
      "updated_at": "2026-10-25T03:13:01.807Z",
      "bitcoin_block_height": 973001,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add5bc8c513bc45e243fb0cabee9550f75bd670f3db1de73487472ff02077269451f53383fede63a2963aa6"
        },
        {
          "type": "bitcoin",
          "block_height": 973001,
          "merkle_root": "7523ceb63fadcaf8408d48fb7985b756a5380aa791b1c4b4c0859bc661126d19"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "pending",
      "submitted_at": "2026-10-25T01:30:47.444Z",
      "updated_at": "2026-10-25T01:30:47.444Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add5bc8dfb261562e0173d98a96e8be37a526fa072031da35819d2fa0b2a897fff305d4a75d4f9ce0618e66"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/141/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."
}