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 0x66b16964f9a8a8724329275da26ecbbb51ce06adfe7a6732f4df6fde6d4c8312. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21c41362-af1c-4808-ab52-1c5e6a883d60.json and https://artists.proofprofile.net/proofs/artist/21c41362-af1c-4808-ab52-1c5e6a883d60.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Montparnasse Melodies: Smooth Jazz Classics
Moonlight in Paris: Coffee Shop Melodies
Parisian Nights: Morning Jazz Collection
Portrait in Paris: French Coffee Shop Jazz