Thomas, Tommy, or Tom Hamilton may refer to: Scottish peers Thomas Hamilton, 1st Earl of Haddington (1563–1637), Scottish administrator, Lord Advocate and judge Thomas Hamilton, 2nd Earl of Haddingto
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 0xfd97e22beb266b1d3b63d5fa4b6ee85b4da5a8aa3cab0bb177d6ee042c087817. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44544425-2edd-4081-84a4-6a53e9292a7f.json and https://artists.proofprofile.net/proofs/artist/44544425-2edd-4081-84a4-6a53e9292a7f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).