{
  "height": 94,
  "block_hash": "f30deddc685a2323a830c940f3dc3a17dc191ca40d4f32de0422cc648d4196ba",
  "status": "confirmed",
  "bitcoin_block_height": 974888,
  "digest": {
    "alg": "sha256",
    "hex": "f30deddc685a2323a830c940f3dc3a17dc191ca40d4f32de0422cc648d4196ba",
    "preimage": "block:{\"at\":\"2026-11-07T02:59:15.359Z\",\"entry_count\":2,\"first_seq\":200,\"height\":94,\"key_id\":\"key_a521921c2ba20669\",\"last_seq\":201,\"merkle_root\":\"fb46f146cf36ab1c131e456066d8e4237291ed04bf638b62c92545c9b93e8574\",\"prev_hash\":\"7848e955ce6c08b41be59909c879068e914d4892e7147a8c36449d78ea470bea\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-11-07T03:08:43.475Z",
      "updated_at": "2026-11-07T05:08:43.485Z",
      "bitcoin_block_height": 974888,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6aee963cce5b85ead01db1f6c1751d5d9d295470334d503b0f835adeb5040f6cf764e18f08a011210129ed12"
        },
        {
          "type": "bitcoin",
          "block_height": 974888,
          "merkle_root": "a373ea77dcacd26df989734c2bed34895920c60a915ed91eb73aa06c53238081"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-11-07T03:08:43.475Z",
      "updated_at": "2026-11-07T05:08:43.485Z",
      "bitcoin_block_height": 974888,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6aee963cdc1943235e7d6f013d81b7769cf6bea30a20e217fc5a530f05c21e6a1cc94cc289e4c9a1f0ed919c"
        },
        {
          "type": "bitcoin",
          "block_height": 974888,
          "merkle_root": "a373ea77dcacd26df989734c2bed34895920c60a915ed91eb73aa06c53238081"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "pending",
      "submitted_at": "2026-11-07T03:08:43.475Z",
      "updated_at": "2026-11-07T03:08:43.475Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6aee963ced02854fbc5a02e1ce64f1eb17899bae887df9643406e6375275493fd0cc9e5a4035d4637c218a0f"
        }
      ]
    }
  ],
  "proof_url": "https://www.a2ally.com/v1/ledger/blocks/94/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."
}