{
  "height": 96,
  "block_hash": "ef12c14cd6ca0b63bf6a886133fcfabfaea2b68b775964d8b5f5d6bedf082d2d",
  "status": "confirmed",
  "bitcoin_block_height": 974888,
  "digest": {
    "alg": "sha256",
    "hex": "ef12c14cd6ca0b63bf6a886133fcfabfaea2b68b775964d8b5f5d6bedf082d2d",
    "preimage": "block:{\"at\":\"2026-11-07T03:04:15.366Z\",\"entry_count\":2,\"first_seq\":203,\"height\":96,\"key_id\":\"key_a521921c2ba20669\",\"last_seq\":204,\"merkle_root\":\"d52b2bf4b2739cb25156242a308ea6d80ec1e276e680d516389d764f4c88a7ce\",\"prev_hash\":\"5379853cdd920ac1cb0741db34b1c13017d5a9a2f9af756daadba18be3567c0c\",\"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": "6aee963e38870781e1c81311eba6dd7537e26cc81bcbe206223c60f765c27baea7c4199aaf39a428045cb0c4"
        },
        {
          "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": "6aee963e42c0f59a2979be9bfc92007417e228a0d9d2d70d8ee850556f742e4312d450e0f2da0a7a28ba26d1"
        },
        {
          "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": "6aee963e2fca6e1f659122c8f8ca46fe91e51dbbd2f5ceb10db013cf019842e76fbd1206e59fd60612a8732d"
        }
      ]
    }
  ],
  "proof_url": "https://www.a2ally.com/v1/ledger/blocks/96/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."
}