{
  "height": 117,
  "block_hash": "a678bb2523f37d303bb85d53055c3568c23e2eb76561c5f38648f47b7b7bbbd7",
  "status": "confirmed",
  "bitcoin_block_height": 972990,
  "digest": {
    "alg": "sha256",
    "hex": "a678bb2523f37d303bb85d53055c3568c23e2eb76561c5f38648f47b7b7bbbd7",
    "preimage": "block:{\"at\":\"2026-10-24T23:23:37.987Z\",\"entry_count\":1,\"first_seq\":120,\"height\":117,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":120,\"merkle_root\":\"a70344690a15cc778a7a20416e5ff9fcdd7ece6a8cd17e8661347214b874fa52\",\"prev_hash\":\"2ae49140c36cc7eb6f0dc519a8ddfc535e450f5693be8621ecd71fe0119e6ae4\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T23:28:07.681Z",
      "updated_at": "2026-10-25T00:31:17.450Z",
      "bitcoin_block_height": 972990,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add3f09e2d46d23773d93c4fdc624a25dcfd9971b5ee221739c6e8e86890313381522af82cbefab3df1f815"
        },
        {
          "type": "bitcoin",
          "block_height": 972990,
          "merkle_root": "ca5f37c044e98d67187e068f6b800f744bac4872b6795978fd232d5b796df42e"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T23:28:07.681Z",
      "updated_at": "2026-10-25T00:31:17.450Z",
      "bitcoin_block_height": 972990,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add3f083da9e70937d02559f0f843091ea033ee608e781a89f7024e652e7f46c9f5ebfa8ab102d1c4b9141f"
        },
        {
          "type": "bitcoin",
          "block_height": 972990,
          "merkle_root": "ca5f37c044e98d67187e068f6b800f744bac4872b6795978fd232d5b796df42e"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T23:28:07.681Z",
      "updated_at": "2026-10-25T02:39:47.523Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add3f0975173928cba6761757d56ef256edacd91a6897b4e9d4eb694c6034f06925765898c433a86dda2573"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/117/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."
}