{
  "height": 7,
  "block_hash": "9f6679f8acf17a15e33e1a3b5bb1ec7cd836738b14095de2fa91a812618e6608",
  "status": "confirmed",
  "bitcoin_block_height": 971786,
  "digest": {
    "alg": "sha256",
    "hex": "9f6679f8acf17a15e33e1a3b5bb1ec7cd836738b14095de2fa91a812618e6608",
    "preimage": "block:{\"at\":\"2026-10-17T00:10:59.915Z\",\"entry_count\":1,\"first_seq\":9,\"height\":7,\"key_id\":\"key_f6a85f595bce8b9f\",\"last_seq\":9,\"merkle_root\":\"b04353b832ee3a8d6f91186586a5d4a06d8ef14d4afce152e04aba12100b0d57\",\"prev_hash\":\"b09777366d769ddf7f0d71f5ea79a7740d901a568ac83efb4536ab904dfa97dc\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-17T00:16:08.024Z",
      "updated_at": "2026-10-17T02:16:08.080Z",
      "bitcoin_block_height": 971786,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6ad2be493b2d40d5edc5317c25d7945542127ffdf82e6c695fa5406f5bfdc2ec5af16e33c79f5b7f2d4ff096"
        },
        {
          "type": "bitcoin",
          "block_height": 971786,
          "merkle_root": "b208c5b7ce44918c557bbc182af2cf7499f386f0a33029290654eeec6a9b540a"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-17T00:16:08.024Z",
      "updated_at": "2026-10-17T03:16:08.100Z",
      "bitcoin_block_height": 971788,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6ad2be49a1b2a09b5433f69cc03f9ce73dc8ff7127a06acf6bb9722474cca9987ec2c903419260d45dce3609"
        },
        {
          "type": "bitcoin",
          "block_height": 971788,
          "merkle_root": "69bb202b6494bf846506606086bbc60faa7fc417fde38d3cc833f9550d35fbbd"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-17T00:16:08.024Z",
      "updated_at": "2026-10-17T05:16:08.117Z",
      "bitcoin_block_height": 971803,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6ad2be48f86e5a9c1b18c8964b29314fbe02b33127a6625596070a39280f1eabc7aba5add9671a50a8f9a9c4"
        },
        {
          "type": "bitcoin",
          "block_height": 971803,
          "merkle_root": "1fc89a759e5d8597c8e6481d5cb4874519c910d1b743b3a96f90db9dbee854c0"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/7/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."
}