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 0xab7c850f9e3578b7bfc3a3a3bd548f6698b4b2e74c7fbe137589d03f4feaf59f. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25d5e9a8-9f29-4fc2-a1cb-6865eb0f58b2.json and https://artists.proofprofile.net/proofs/artist/25d5e9a8-9f29-4fc2-a1cb-6865eb0f58b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Absence (feat. Jacques Metehen et son orchestre) [Mono Version]
Jean Lumière chante Paul Delmet (Mono Version)
Mélodies - EP (Arranged for Voice and Orchestra, Mono Version)
Chante Delmet, no. 2 (feat. André Grassi et son orchestre) [Mono Version]
Jean Lumière chante Delmet (feat. André Grassi et son orchestre) [Mono Version]
La chanson des blés d'or (feat. Jean Decousser et son orchestre) [Mono Version]
Les belles années du music-hall (Mono Version)
Voulez-vous danser grand'mère ? (feat. Jacques Météhen et son orchestre, Marcel Carniven et son orchestre) [Mono Version]
Les quatre dimanche de mai (Mono Version)
La petite église (Collection "Légende de la chanson française")
Le prince de la chanson de charme: Les plus belles chansons (100 titres d'or)
Les Inoubliables De La Chanson Française Vol. 3 — Jean Lumière
7 merveilles de la musique: Jean Lumière
Du Music-Hall aux Années 60 (1950-1960): Jean Lumière, Vol. 36/43
Meilleure collection française: Le meilleur de Jean Lumière
Chansons françaises des années 1900 : Jean Lumière, Vol. 1