{
  "height": 92,
  "block_hash": "38d5b76469dd01d40f5c8c5c71eade8911d3fa6d0f82f7650360829eb0d0cc49",
  "status": "confirmed",
  "bitcoin_block_height": 974883,
  "digest": {
    "alg": "sha256",
    "hex": "38d5b76469dd01d40f5c8c5c71eade8911d3fa6d0f82f7650360829eb0d0cc49",
    "preimage": "block:{\"at\":\"2026-11-07T02:54:15.349Z\",\"entry_count\":2,\"first_seq\":197,\"height\":92,\"key_id\":\"key_a521921c2ba20669\",\"last_seq\":198,\"merkle_root\":\"52d2dd5b9741e8ac93e2e671fb194ef31fa5c39a7f7d05f5ba40d1b1f6851a07\",\"prev_hash\":\"5eb7bf34f81a46e42988754cc4636a82cec742ef0c64a1e7e134a66859e33323\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-11-07T02:58:43.471Z",
      "updated_at": "2026-11-07T04:58:43.484Z",
      "bitcoin_block_height": 974883,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6aee93e69a8416fba1149ed85d232896db5667852fc11f0a3b248eaaae60256f8a0b38891375655651237536"
        },
        {
          "type": "bitcoin",
          "block_height": 974883,
          "merkle_root": "79abb9dd33baad0a1ff37045cc779f6fe1b133a7037999fbd2c996ad78e43b90"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-11-07T02:58:43.471Z",
      "updated_at": "2026-11-07T04:58:43.484Z",
      "bitcoin_block_height": 974883,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6aee93e68885f5f0a7999427f47150be0fd25cefcf687b7d388fb54943f87fc0862e20dc870cabb94f1ed188"
        },
        {
          "type": "bitcoin",
          "block_height": 974883,
          "merkle_root": "79abb9dd33baad0a1ff37045cc779f6fe1b133a7037999fbd2c996ad78e43b90"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "pending",
      "submitted_at": "2026-11-07T02:58:43.471Z",
      "updated_at": "2026-11-07T02:58:43.471Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6aee93e5b01296abe42cd2753603bae5542610a20e202967a679b5866ed9bf774fa5b0e6ea1d6ae8ce52b10d"
        }
      ]
    }
  ],
  "proof_url": "https://www.a2ally.com/v1/ledger/blocks/92/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."
}