{
  "height": 168,
  "block_hash": "e3e51607ca8c68a07bb1d3cfa9edacad69804a9f782cd28bd48cff7f31ff895a",
  "status": "confirmed",
  "bitcoin_block_height": 973013,
  "digest": {
    "alg": "sha256",
    "hex": "e3e51607ca8c68a07bb1d3cfa9edacad69804a9f782cd28bd48cff7f31ff895a",
    "preimage": "block:{\"at\":\"2026-10-25T03:44:21.240Z\",\"entry_count\":2,\"first_seq\":208,\"height\":168,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":209,\"merkle_root\":\"f535704b01b99792129c084f5d5720db2b15aad690c9dfb20a5491782d6646a8\",\"prev_hash\":\"27d2bef671f6615ca3a08fc5e9d82bf1af8d3b2aeb1edb677353c7325fec6473\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T03:48:50.516Z",
      "updated_at": "2026-10-25T04:50:23.355Z",
      "bitcoin_block_height": 973013,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add7c248910562567c80f4a56507a1374fe8d0b4937c513ef1cfcd8f50aa2ce5231faf669d28795b5354935"
        },
        {
          "type": "bitcoin",
          "block_height": 973013,
          "merkle_root": "3d312df43b8546a3f616c3e18e55a3b1a2799f5b24b1917bcd798bf615499c58"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T03:48:50.516Z",
      "updated_at": "2026-10-25T04:50:23.355Z",
      "bitcoin_block_height": 973013,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add7c2429377e3b9e1b655d4866e9c2008a3dc5b9280416c233bdbbd3fb394b4d01e28f69119a6735fdb767"
        },
        {
          "type": "bitcoin",
          "block_height": 973013,
          "merkle_root": "3d312df43b8546a3f616c3e18e55a3b1a2799f5b24b1917bcd798bf615499c58"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "pending",
      "submitted_at": "2026-10-25T03:48:50.516Z",
      "updated_at": "2026-10-25T03:48:50.516Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add7c24fda9b9cda1959c5b83c5c8634ed554113822ec845cae1fe7f6782f17f7e3ccdadd440f91e4dda2f3"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/168/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."
}