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 0xcbd2de2b01ba9d420defe5132e98cbb0ca2738a376fcced2e077d1ba58d24c09. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb76f50e-4b06-4ee9-bc4c-be23ffa3ee31.json and https://artists.proofprofile.net/proofs/artist/bb76f50e-4b06-4ee9-bc4c-be23ffa3ee31.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Breton Dance (Celtic Traditional Instrumentals Music from Brittany - Keltia Musique - Bretagne)
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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0x4a50a349c5d9e60df93e0a209c2cc7fe122c69cf1fb968777bcad43706944c69. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:20Z), 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/FR6V81996828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74553b33a1beca740ff8df0b7545cb5028b221d0b461138521299fdaea4dad7e. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/FR6V81996831.
Hommage à Jean Magadur / Inour de Yann Magadur (Traditional Breton Music / Celtic Music from Brittany / Keltia Musique)
Musique sacrée et mélodies bretonnes- Sacred Music and Breton Airs (Bombarde, ocarina, orgue)
Kejadenn (feat. Jean Michel Mansano) [Concert of Sacred and Secular Music of Brittany - Celtic Music - Keltia Musique - Bretagne]
Sonaozadur (Breton music / celtic music from brittany / keltia musique-bretagne)
Dansou tro Breiz (Breton Music - Celtic Music from Brittany - Keltia musique- Bretagne)
Dansou C'hoari (Danses et Jeux de Bretagne / Traditional Breton Music / Celtic Music from Brittany / Keltia Musique)
Hentad - Journey (Musiques et danses de Bretagne - Folk Dances of Brittany - Keltia Musique)
Berjelenn (Melodies et danses de Bretagne)