{
  "height": 98,
  "block_hash": "f0dd016735065ef2bc44e74e69034b85451e6f8c86dbadf8e2b5fdf778c2a81d",
  "status": "confirmed",
  "bitcoin_block_height": 974888,
  "digest": {
    "alg": "sha256",
    "hex": "f0dd016735065ef2bc44e74e69034b85451e6f8c86dbadf8e2b5fdf778c2a81d",
    "preimage": "block:{\"at\":\"2026-11-07T03:09:15.408Z\",\"entry_count\":2,\"first_seq\":206,\"height\":98,\"key_id\":\"key_a521921c2ba20669\",\"last_seq\":207,\"merkle_root\":\"bc069cc68798a048dde672549eecfd39fab29d10f5c7960ca591ca0bf554962a\",\"prev_hash\":\"278516bd56cc353ab721667c64a42721e4218dfc14dbd14d5a8b84f0e623f11d\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-11-07T03:18:43.476Z",
      "updated_at": "2026-11-07T05:18:43.485Z",
      "bitcoin_block_height": 974888,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6aee989422933cec9d92adc84b13b75af3065aaedaedc9e3e8ce329d43196849ac5be6c7606b0030541ad85f"
        },
        {
          "type": "bitcoin",
          "block_height": 974888,
          "merkle_root": "a373ea77dcacd26df989734c2bed34895920c60a915ed91eb73aa06c53238081"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-11-07T03:18:43.476Z",
      "updated_at": "2026-11-07T05:18:43.485Z",
      "bitcoin_block_height": 974888,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6aee989470bc46cc14c7d935c2f507d3efc51eeef51221cbadb63b4dd8365d662734f073e2f8adebb591f793"
        },
        {
          "type": "bitcoin",
          "block_height": 974888,
          "merkle_root": "a373ea77dcacd26df989734c2bed34895920c60a915ed91eb73aa06c53238081"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "pending",
      "submitted_at": "2026-11-07T03:18:43.476Z",
      "updated_at": "2026-11-07T03:18:43.476Z",
      "bitcoin_block_height": null,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6aee9894113d634743ed7f03aadadb5f1a4893db86d8903d96826f43ddcb884236fbd88b86ce3c95ae00ef9e"
        }
      ]
    }
  ],
  "proof_url": "https://www.a2ally.com/v1/ledger/blocks/98/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."
}