{
  "height": 0,
  "block_hash": "0aad1605bfe10fe1370da1ff6dd97a95d382b04e66c402ea3a32bb94016c41a7",
  "status": "pending",
  "bitcoin_block_height": null,
  "digest": {
    "alg": "sha256",
    "hex": "0aad1605bfe10fe1370da1ff6dd97a95d382b04e66c402ea3a32bb94016c41a7",
    "preimage": "block:{\"at\":\"2026-11-06T22:14:47.799Z\",\"entry_count\":11,\"first_seq\":1,\"height\":0,\"key_id\":\"key_a521921c2ba20669\",\"last_seq\":11,\"merkle_root\":\"6fb8f7b379fbf1e700541a0dfc67ed3775684bfe8526ff6e77d269b586a9bc43\",\"prev_hash\":\"0000000000000000000000000000000000000000000000000000000000000000\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "pending",
      "submitted_at": "2026-11-06T22:15:17.913Z",
      "updated_at": "2026-11-06T22:15:17.913Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6aee517757cf8964d122270b3de093d3ecc7cb6ee44572cd90095f8748008d66b3e0fff23acd34b8b9af24f5"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "pending",
      "submitted_at": "2026-11-06T22:15:17.913Z",
      "updated_at": "2026-11-06T22:15:17.913Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6aee5178ccb90d26bb07b9f8245efde8a5a0442cefe089e5deaef433a94e0746ccb74072a5416ce7845536ec"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "pending",
      "submitted_at": "2026-11-06T22:15:17.913Z",
      "updated_at": "2026-11-06T22:15:17.913Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6aee5178a54fd5c470cc3ff7279dfed7090ce0aa1a90f955ec92e9fa0cbd8d191607af7016f72d16f856def4"
        }
      ]
    }
  ],
  "proof_url": "https://www.a2ally.com/v1/ledger/blocks/0/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."
}