{
  "height": 167,
  "block_hash": "27d2bef671f6615ca3a08fc5e9d82bf1af8d3b2aeb1edb677353c7325fec6473",
  "status": "confirmed",
  "bitcoin_block_height": 973013,
  "digest": {
    "alg": "sha256",
    "hex": "27d2bef671f6615ca3a08fc5e9d82bf1af8d3b2aeb1edb677353c7325fec6473",
    "preimage": "block:{\"at\":\"2026-10-25T03:39:21.211Z\",\"entry_count\":2,\"first_seq\":206,\"height\":167,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":207,\"merkle_root\":\"59477aa6dd05f4501c22fa112aa25c762595708fc6beedcacaab2366e63f561f\",\"prev_hash\":\"61756ba63fe6d57e58f4c30206550e6d17a34a1e3f8408a28b2375cf0828b784\",\"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": "6add7c23cac4bb1cc22e6877ba80051061d4f425c2530f136ff1b2554f29fdcab8f827c2a16275f882f8f6ab"
        },
        {
          "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": "6add7c239de681c39057ec5cc513b5231b2a5794eb5092843dce5a1b6a8bb17c6d1f54802a41decb41b8f23f"
        },
        {
          "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": "6add7c23e3498adaf6f89ae9c8b48ae7e0a831efb5320ae36118945464b26fadcd41e12a3cc6b52fd4e7ec79"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/167/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."
}