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 0xaaa71328270d07064a8c530c81c4dea18f68719ebcc403c758653257688c98c1. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63029b81-f3ec-422f-8346-50d1d1eb7c77.json and https://artists.proofprofile.net/proofs/artist/63029b81-f3ec-422f-8346-50d1d1eb7c77.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Paris Love Café – Timeless French Jazz Romance
Paris Swing Nights – Belle Époque Romance
Amants sur la Seine - Jazz Romantique Français
Café de Minuit – Jazz & Chansons du Cœur
Valse des Amants de Montparnasse (Jazz & Chansons d’Amour à Paris)
Minuit à Paris (Chansons d’Amour et de Jazz)
Noël à Paris (Jazz sous les Lumières du Vieux Montmartre)