Daniel Hill or Dan Hill may refer to: Daniel Harvey Hill (18211889), American Confederate general in the Civil War Daniel Harvey Hill Jr. (18591924), American educator and the third chancellor of N
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fa96d8fbbeb1966d91ae00c2e94b370e73edbfb32909297fbfbb5fbd4b113b. Chain 2 (Bitcoin): anchored in block 954038 (2026-06-17T02:57:22Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3de4fb20-c243-47fe-aeeb-c9689252b1be.json and https://artists.proofprofile.net/proofs/artist/3de4fb20-c243-47fe-aeeb-c9689252b1be.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Cold Wind Blows (The Final Voyage of Captain James Cook)