{
  "height": 163,
  "block_hash": "d7b2b560076bea4ef1919902166699ef68a4f90eb83d8cc22cf918589c11b8d4",
  "status": "confirmed",
  "bitcoin_block_height": 973010,
  "digest": {
    "alg": "sha256",
    "hex": "d7b2b560076bea4ef1919902166699ef68a4f90eb83d8cc22cf918589c11b8d4",
    "preimage": "block:{\"at\":\"2026-10-25T03:18:02.057Z\",\"entry_count\":2,\"first_seq\":198,\"height\":163,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":199,\"merkle_root\":\"86d3ff58ad6d714ce7ddaa8d8fc1947d42640e94e7513790972c56e3128169c0\",\"prev_hash\":\"74bc50bb848641d6193ab6681f0e9b90c3f972bcee0cb953929b45b58d4634fc\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T03:19:20.510Z",
      "updated_at": "2026-10-25T04:28:50.521Z",
      "bitcoin_block_height": 973010,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add753976d0cbbce2663b389f06721537705cb590b5ed73d58b36749c58d85f86276818892384de65848efc"
        },
        {
          "type": "bitcoin",
          "block_height": 973010,
          "merkle_root": "dc04a7fb9aea89a51c41e84f6a61d3a360a4067d8910d5945ceb0b4d85cd2229"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T03:19:20.510Z",
      "updated_at": "2026-10-25T04:28:50.521Z",
      "bitcoin_block_height": 973010,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add75390b72133f0ca21d0f4ad9f758c2400599f7ee3dac70da0909d03a5df0585b1b1e654b8eb401192d7d"
        },
        {
          "type": "bitcoin",
          "block_height": 973010,
          "merkle_root": "dc04a7fb9aea89a51c41e84f6a61d3a360a4067d8910d5945ceb0b4d85cd2229"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "pending",
      "submitted_at": "2026-10-25T03:19:20.510Z",
      "updated_at": "2026-10-25T03:19:20.510Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add7539c24f5622bbc1366d720bc34675fadef206c527909548c6c606a796b3ee885368714b19706a0ce889"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/163/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."
}