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 0xa57e767f5bccf82ff1755db65d583a7f611ce5a27fd11a019685dcde1350ac27. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a889844e-7c78-4c11-b532-8267bd0f3b52.json and https://artists.proofprofile.net/proofs/artist/a889844e-7c78-4c11-b532-8267bd0f3b52.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Limbo (Original Motion Picture Soundtrack)
Le ballet des épousailles (Arr. Martin Batchelar d'après l'ouverture de Guillaume Tell de Gioacchino Rossini)
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 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 0xbf423663ca023c8f67aacc9e30ab7f2837dca7355ddd33d3cec424c063e5904b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBAYC2001811.
Nymphes et sylphides (Arr. Martin Batchelar d'après Le Lac des Cygnes, Op. 20 de Pyotr Ilyich Tchaikovsky)
Les Noces de Feu (Les musiques du spectacle, extraits)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50034bd4e890d8098b5d2d65de1835c54ebbce340862249eafb2da101c5ac2a4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYC2001804.
Danse du lac (Arr. Martin Batchelar d'après Csárdás de Vittorio Monti)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5585379ffec94b7a7286f46ff327d59a87f2ecb69e4c86a36c38fa5caa8f5e6c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR9W12044418.
L'orgue d'eau (Arr. Martin Batchelar d'après la Symphonie No. 3, Op. 78 de Camille Saint-Saëns)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e72aeb2107e53ca91e7d09008c8f50eaff7b84bf88e0c973b95bfaab5ed94e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBAYC2001809.