{
  "height": 169,
  "block_hash": "55529741772b45d00b3b8747525611d0655fe64b9cd6861fbcf9a4a424428e88",
  "status": "confirmed",
  "bitcoin_block_height": 973013,
  "digest": {
    "alg": "sha256",
    "hex": "55529741772b45d00b3b8747525611d0655fe64b9cd6861fbcf9a4a424428e88",
    "preimage": "block:{\"at\":\"2026-10-25T03:49:21.257Z\",\"entry_count\":2,\"first_seq\":210,\"height\":169,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":211,\"merkle_root\":\"7a4a838ee0daf896dba8b2000454c8b719b78671bedc796545958aae04dbc0b7\",\"prev_hash\":\"e3e51607ca8c68a07bb1d3cfa9edacad69804a9f782cd28bd48cff7f31ff895a\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T03:58:50.518Z",
      "updated_at": "2026-10-25T05:00:23.356Z",
      "bitcoin_block_height": 973013,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add7e7b0dca41a9f075d2ebcbf745d003cd170a73ca9cd58a1834c047bc7b74a4344587c95f3218fe05cae2"
        },
        {
          "type": "bitcoin",
          "block_height": 973013,
          "merkle_root": "3d312df43b8546a3f616c3e18e55a3b1a2799f5b24b1917bcd798bf615499c58"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T03:58:50.518Z",
      "updated_at": "2026-10-25T05:00:23.356Z",
      "bitcoin_block_height": 973013,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add7e7a77e9c2e4e41e08301699eec046e8685bc6d181cfea1b12852cf6d9b9ba476e85b45dce96879f202e"
        },
        {
          "type": "bitcoin",
          "block_height": 973013,
          "merkle_root": "3d312df43b8546a3f616c3e18e55a3b1a2799f5b24b1917bcd798bf615499c58"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "pending",
      "submitted_at": "2026-10-25T03:58:50.518Z",
      "updated_at": "2026-10-25T03:58:50.518Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add7e7bbc503a0e8db6d613021a884319a7e11782bcffd64de0261edff1aef03b5964361206707dc07fac08"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/169/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."
}