{
  "height": 22,
  "block_hash": "b735d80077920c3affe2e0aa607b7bfe56c9e0c419516f4c7159cb4cc1d81ad5",
  "status": "confirmed",
  "bitcoin_block_height": 972873,
  "digest": {
    "alg": "sha256",
    "hex": "b735d80077920c3affe2e0aa607b7bfe56c9e0c419516f4c7159cb4cc1d81ad5",
    "preimage": "block:{\"at\":\"2026-10-24T03:43:42.387Z\",\"entry_count\":1,\"first_seq\":24,\"height\":22,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":24,\"merkle_root\":\"03edb0b7e25ab3340f2df5106c7fbec3aaf3202c5d0679d32ca578fdf628227e\",\"prev_hash\":\"99f56bdd0b27dbb75314ddbf2f60ab57435cfe5460f3501a701f026b2d94d16b\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T03:44:12.394Z",
      "updated_at": "2026-10-24T05:53:42.416Z",
      "bitcoin_block_height": 972873,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6adc298c3ed52e74a82860d8c50a3f45c360a99fa091e490bc18905156209b5ceb146c222e5cb8f10bd6d845"
        },
        {
          "type": "bitcoin",
          "block_height": 972873,
          "merkle_root": "90625906d9233b07692b176a16b5d11b1009eac87b2978f793dba69be8e83ec5"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T03:44:12.394Z",
      "updated_at": "2026-10-24T05:53:42.416Z",
      "bitcoin_block_height": 972874,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6adc298d2bf5c1509410c3591d4d3f9fc566aca53f819522a20e6843dd11db7c9df68358761caa17927e88b1"
        },
        {
          "type": "bitcoin",
          "block_height": 972874,
          "merkle_root": "f22ea8a5f3bf05d2d8a064c1d5e33f38523361910c97dcf3695a2b0e6e9bb249"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T03:44:12.394Z",
      "updated_at": "2026-10-24T11:53:42.478Z",
      "bitcoin_block_height": 972911,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6adc298de0cb3a3eeb17b5c3d0bfc9e9b9d3eb472e07ed2f9c0c5b6e0b637db67a1e0eed5e4e7bbc752f44c9"
        },
        {
          "type": "bitcoin",
          "block_height": 972911,
          "merkle_root": "af384043069b917afbadf259a575899e396392fd31d7a1ae89c5912c49549f08"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/22/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."
}