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 0xc071c6e77718589e66dac4e16ab823ae28d4d8f77d4c19da773648c517cc65b6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abc8da0d-6858-4183-81f9-19800ba0642c.json and https://artists.proofprofile.net/proofs/artist/abc8da0d-6858-4183-81f9-19800ba0642c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Series Mania 2019 (Bande originale du festival)
Marcher sur l'eau (Original Motion Picture Soundtrack)
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 0xdbd526f350bb7e99dbcf2cffea42fad585230408414703525f40d2d4f8e152fb. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:05:01Z), 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/FR8N92100640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e06643f454150cdeb3b3eaa202cb5d1a59b4aab955a05f44b414ff2c5a75a4. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:36:21Z), 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/FR9W12116089.
Blood Rites (Original Motion Picture Soundtrack)
The Apology (Original Motion Picture Soundtrack)
Denise's Theme (Extrait de la bande originale du film "Les femmes au balcon")
Les femmes au balcon (Bande originale du film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba65d54098ef0dfb72698ff0118f5c54f0bcfb7277ff54a3919a9229795e879. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEG932100154.
Maigret (Closing Titles) [From 'Maigret' Original Series Soundtrack]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07897f6e16de22c9ba287f2c708b7abff5ff68f27ecf479c664de8896abf14e1. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/FR9W12553852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673f602542983cf48e56c0477af1fae1531dd53661e36c61a00f6584f5be3471. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USSM12102575.