thumbnail|Sir Noah Thomas in painting by George Romney, 1781. Sir Noah Thomas FRS FRCP (1720 – 17 May 1792) was a Welsh physician who was physician-in-ordinary to King George III. He was a fellow of
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50d38f372d490d8f20fe2415dac6a89fdc2af2da0cd4479357284eb1fbaa7be. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47b9b508-ed84-4b3a-94d9-9671b3ce0a0d.json and https://artists.proofprofile.net/proofs/artist/47b9b508-ed84-4b3a-94d9-9671b3ce0a0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).