thumb|David Paquette David Paquette (born 1940) is an American jazz pianist. He has recorded more than 3 albums. Highlights of his career include touring the European jazz circuit, establishing and d
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 0x6d8bda928bb979b00439ce0d94b4d2911c800e7fec518fcb8532bbba1fa587b9. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57933127-6987-4656-9f45-b3089d7b2668.json and https://artists.proofprofile.net/proofs/artist/57933127-6987-4656-9f45-b3089d7b2668.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
David Paquette and His International Trio