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 0x328b182b0f70a8e774ae0b7e567372e6d7f1c9a97c08958338b1c43d6809925f. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/826cd95f-1b17-46e8-9467-af2b11fb44e5.json and https://artists.proofprofile.net/proofs/artist/826cd95f-1b17-46e8-9467-af2b11fb44e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Branle des lavandières et branle des pois, Orchésographie
Musiques à danser de la Renaissance francaise
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 0xd84288176115c7cdd6377b98e418025d3d71ca951bc84fe9da0ce35097d578b3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ299546200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9253c8330a3691f382ee3bfd97592b3e52b6f484b80fb215fa0259b4d73fad92. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRZ299546010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f903c309ed401297dc47ac0d51319d49feb34feb45d21f7565d233081e9fd4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ299546030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde137ec090d0331f4093e00c51d1c0f8b6af98d67fba10a5de74eb0f80b11f1e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ299546130.
Almande Poussinghe, receuil de danceries
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40014286b384188afd76d8440ab74a831ba51a2e8cfb52d878094684eec4ae22. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ299546080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ee9b4048987ca44919b489cec4b7b57509be15a1ba27265a6c096d43335e66. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FRZ299546040.
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
Branles de Poitou N6, 5ème Livre de danceries
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63410ba665831701a4f71eace24a2d30a86c17ee71fd1c86cb641f4c287cb7c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRZ299546020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fab35610f900a5f1e247030fb26f3f0d4c257cd6647f130827103e8b924cec. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRZ299546050.
Pavane première, 7ème Livre de danceries
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf30ce41d19ab93ecdd9acfd9f8f5ac03f099b946920fdb466595982dafdca25. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRZ299546060.
Branles simples N20-21-22, musicque de joye
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f2fc5526d52f1e506984dde14948cb320e5ef445217c6e02cf15f75a2ccf79. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRZ299546100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28690d35a3aae626f8eade87bfb1efd53dd1080e1c3a72a7e45ed6acc2b95be8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRZ299546150.