{
  "height": 11,
  "block_hash": "d8eb70dbf8489cc62584327345cb03f4191b4534be8153f47ec347acbea98720",
  "status": "confirmed",
  "bitcoin_block_height": 972110,
  "digest": {
    "alg": "sha256",
    "hex": "d8eb70dbf8489cc62584327345cb03f4191b4534be8153f47ec347acbea98720",
    "preimage": "block:{\"at\":\"2026-10-19T04:24:25.644Z\",\"entry_count\":1,\"first_seq\":13,\"height\":11,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":13,\"merkle_root\":\"84655f99bc185ba9b24185f56a8866f2e65413ac1b3666fefce2c20487b30bed\",\"prev_hash\":\"985fb5ef64ef3a52fde28495eaa8237a011a46fcace38c263131be4bb810279f\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-19T04:31:25.892Z",
      "updated_at": "2026-10-19T07:40:55.924Z",
      "bitcoin_block_height": 972110,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6ad59d1e7cac874e5868065a1246b31095744077197b9244a2c7066f52b357406732af382b6070b1e2c46253"
        },
        {
          "type": "bitcoin",
          "block_height": 972110,
          "merkle_root": "d9b5d57d020f8c9257eb1dad5a7a5ef1133ecb822dbe5cc9713e5b22d9059706"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-19T04:31:25.892Z",
      "updated_at": "2026-10-19T08:40:55.944Z",
      "bitcoin_block_height": 972115,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6ad59d1e2eb096d71af71a60e169f9c0fd82d4b49e347a342dcd89596a8414a2e87d59af6be73fa444e94fab"
        },
        {
          "type": "bitcoin",
          "block_height": 972115,
          "merkle_root": "fc1f7a070be781a2e50ec075203c6a48dbd0e9a5d44737b1a86faf29ba8d3dee"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-19T04:31:25.892Z",
      "updated_at": "2026-10-19T08:40:55.944Z",
      "bitcoin_block_height": 972115,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6ad59d1f61d7a122a13e5aace5e2e8650eb5f673d9d20a7ea4e7ee62d9dc1ad2adf8e58ddc1eb6b3ca7e0d93"
        },
        {
          "type": "bitcoin",
          "block_height": 972115,
          "merkle_root": "fc1f7a070be781a2e50ec075203c6a48dbd0e9a5d44737b1a86faf29ba8d3dee"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/11/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."
}