1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x585fb931e68e18a6ea633928e4450db62cb5cc6b074652da8dd155bdadcda93d. 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/2b962e4c-8908-45ba-a7ad-f28fad53f786.json and https://artists.proofprofile.net/proofs/artist/2b962e4c-8908-45ba-a7ad-f28fad53f786.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chanson rythmée pour de bien tristes gens
Una música baila sobre un mar de llantos
Cuando la vida quema, la muerte sabe a miel - en public
Chants des Communards prisonniers à Versailles
Serge Utgé-Royo chante Léo Ferré : d'amour et de révolte
Contrechants... de ma mémoire (Coffret 3 volumes)
La poésie est une arme chargée de futur - Hommage au poète
Chant des communards prisonniers à Versailles
Amis, dessous la cendre - Version publique
Le nez bleu du clown - Drame du chômage à l'hôtel de l'Elysée
A la jeunesse nue qui n'a que l'avenir...
Memorias Ibéricas (Cantar para los Míos)
Una Musica Baila Sobre un Mar de Llantos
Cuando la Vida Quema, la Muerte Sabe a Miel
Vous pouvez danser - Votre danse macabre
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f681dd99664e5f217deab9ec768b3b4d2262a2d560ad6369732e066832fb0d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEZ250813722.