{
  "height": 134,
  "block_hash": "fbec153acc8e2bf944c8593851f9a56661e41027a9756b085830ccba68380814",
  "status": "confirmed",
  "bitcoin_block_height": 972999,
  "digest": {
    "alg": "sha256",
    "hex": "fbec153acc8e2bf944c8593851f9a56661e41027a9756b085830ccba68380814",
    "preimage": "block:{\"at\":\"2026-10-25T00:46:17.857Z\",\"entry_count\":2,\"first_seq\":139,\"height\":134,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":140,\"merkle_root\":\"afa80505c228d51b635f6dd08d33266b95f281e1b6947f2eb273d1a9fb53ae0d\",\"prev_hash\":\"971aa5402b9397c1e5d11083bd96235a93ad3018a91d5e69e00b2535b39ff212\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T00:50:47.436Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add52696076fd5fca9cc0833c3edacb4dd67cb2c20f88e2adf1262dc954f35baa0e85771ccdf0d8ec3267f7"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-25T00:50:47.436Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add52691c4a12b8609a9c0d63b88a993d1beae1a6fbc111e6ca1c7758b10dbe371f4f22b590b2a87bf7f71b"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-25T00:50:47.436Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add5269c7a40f14da05acf0602cd8406631f6af848e512cd167a89df5e982308e0ef9640d09afad913a7be0"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/134/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."
}