{
  "height": 92,
  "block_hash": "ef807775ce8bad9f35cd6830d7741997c7a8c810f70586598d4908138fa0cf1d",
  "status": "confirmed",
  "bitcoin_block_height": 972978,
  "digest": {
    "alg": "sha256",
    "hex": "ef807775ce8bad9f35cd6830d7741997c7a8c810f70586598d4908138fa0cf1d",
    "preimage": "block:{\"at\":\"2026-10-24T21:12:19.634Z\",\"entry_count\":1,\"first_seq\":95,\"height\":92,\"key_id\":\"key_41eb7b6d1b11968a\",\"last_seq\":95,\"merkle_root\":\"d8a7bc6c952b47c57bfee17a6372594fa6843f731a2497fac986ed00d6ac023b\",\"prev_hash\":\"a0e398dfae6bddba99ef122d9804d5ef2a1ea2f221d38671448b2f4d9c50e08c\",\"v\":1}"
  },
  "calendars": [
    {
      "calendar": "https://a.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T21:16:48.980Z",
      "updated_at": "2026-10-24T22:38:37.669Z",
      "bitcoin_block_height": 972978,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://alice.btc.calendar.opentimestamps.org",
          "commitment": "6add20425b699dc22009af4a4c8a76edc5f5a27b377080d2ebd3a0602943defe5f41c08ce04ad5aee732909e"
        },
        {
          "type": "bitcoin",
          "block_height": 972978,
          "merkle_root": "d210051f3445c39bbf32fb4497d94f03b1526298585065034c1aa7d28ddfd046"
        }
      ]
    },
    {
      "calendar": "https://b.pool.opentimestamps.org",
      "status": "confirmed",
      "submitted_at": "2026-10-24T21:16:48.980Z",
      "updated_at": "2026-10-24T22:38:37.669Z",
      "bitcoin_block_height": 972978,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://bob.btc.calendar.opentimestamps.org",
          "commitment": "6add20421d538c43bc711e9ac80b095f6bd4ef0bd6198f20e509e7b1711419d37075ffd35d11989152c2e8c5"
        },
        {
          "type": "bitcoin",
          "block_height": 972978,
          "merkle_root": "d210051f3445c39bbf32fb4497d94f03b1526298585065034c1aa7d28ddfd046"
        }
      ]
    },
    {
      "calendar": "https://finney.calendar.eternitywall.com",
      "status": "confirmed",
      "submitted_at": "2026-10-24T21:16:48.980Z",
      "updated_at": "2026-10-25T02:49:17.524Z",
      "bitcoin_block_height": 972999,
      "attestations": [
        {
          "type": "pending",
          "uri": "https://finney.calendar.eternitywall.com",
          "commitment": "6add2042b953ca97157518342469cd45d0c5f0b7863ac89e680fe795e0568932d7601ded2bddb49df3b2dee6"
        },
        {
          "type": "bitcoin",
          "block_height": 972999,
          "merkle_root": "ae0e717f0d642956016a8572888d23fb045efcac654b542c5ac908707f3b5590"
        }
      ]
    }
  ],
  "proof_url": "https://www.rightshold.com/v1/ledger/blocks/92/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."
}