{
  "height": 5,
  "block_hash": "d2ac46ee75173fa00546dcc6901a86465b78ed5a1fe7fdc986095bb95b0b2b14",
  "status": "confirmed",
  "bitcoin_block_height": 971602,
  "digest": {
    "alg": "sha256",
    "hex": "d2ac46ee75173fa00546dcc6901a86465b78ed5a1fe7fdc986095bb95b0b2b14",
    "preimage": "block:{\"at\":\"2026-10-15T16:48:48.415Z\",\"entry_count\":1,\"first_seq\":7,\"height\":5,\"key_id\":\"key_f6a85f595bce8b9f\",\"last_seq\":7,\"merkle_root\":\"ce13d6acfa85cfa8577f68e1d11aea7ecd35261cf7f1c1e936e843eefd22afb9\",\"prev_hash\":\"b908636329aecd82ea0540bb171d38dc573ff7fe892540678c1089f7d95c6cf3\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-15T16:49:18.433Z",
      "updated_at": "2026-10-15T18:58:48.532Z",
      "bitcoin_block_height": 971602,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6ad1040e0f361d14ded793ad6701ac5f80fc102eb4f32dd581b8c58b9dedcac898f0dd631f37d88b1ee6d036"
        },
        {
          "type": "bitcoin",
          "block_height": 971602,
          "merkle_root": "44b96e670faa20dccca895393bd7dab25b4ceedcafbed4335c53a39356c62d8a"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-15T16:49:18.433Z",
      "updated_at": "2026-10-15T18:58:48.532Z",
      "bitcoin_block_height": 971603,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6ad1040f175f0051e9c672e2b5e0be8522bef8e6e4298d710381ef37e24354afdc24e399d030a61a7385a9f7"
        },
        {
          "type": "bitcoin",
          "block_height": 971603,
          "merkle_root": "380e87bc7bd7f47c29e0c4b9142c321e7013007061fa5ab7f10addfab29cbd62"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-15T16:49:18.433Z",
      "updated_at": "2026-10-15T23:58:48.766Z",
      "bitcoin_block_height": 971625,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6ad1040e229e108b06c7aa660cf6f80fcf0c26dcc3a163700bf949fb4fb831706a038035201f3fb4b80967b0"
        },
        {
          "type": "bitcoin",
          "block_height": 971625,
          "merkle_root": "add0d3a198b93733c52b5efd8cb826a591a55679998267b71fd9aa04e713de93"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/5/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."
}