John, Johnny, or Jon Hamilton may refer to: Arts and entertainment John Hamilton (painter) (fl. 1765–1786), British painter John R. Hamilton (architect) (), English architect John McLure Hamilton (18
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 0x69727115b86f2dc49d6451ea817fc1d18012827e9c972722403c50e0ca75a0d8. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff1c6b9f-d2f2-4910-9d1b-37d2e2f6e38a.json and https://artists.proofprofile.net/proofs/artist/ff1c6b9f-d2f2-4910-9d1b-37d2e2f6e38a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).