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 0xfe4a94ef5698543a52a60fa33ceb383cd8654293e4a2ccb227543ee9da0bf533. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/721e74cc-6bfe-45f2-a78e-17d37fd34e52.json and https://artists.proofprofile.net/proofs/artist/721e74cc-6bfe-45f2-a78e-17d37fd34e52.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le Roux: Concerts pour deux dessus et basse
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 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.
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 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.
Branle des lavandières et branle des pois, Orchésographie
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.
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.
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 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.
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.
Rosenmuller : Sonate a 2, 3,4 e 5 stromenti da arco & altri
Très brève et familière introduction pour entendre et apprendre par soy même à jouer toute chanson reduite en la tablature du luth: Prélude
Attaingnant: Que je chatoulle ta fossette (Danceries)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55c2540e7d10dd51238ea4321d8a529b85a0e5466b349fb8453ad6682a7e56f. 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/BER180929404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ff5e3af6551f1bc8a04d7da563c48821e285dcf99a89e0c6c7560dc41668bc. 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/BER180929417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400502b84d3832b4270859cc45ff5f5cb516eeebbfa963fe3716d89139580c6d. 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/BER180929411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe2bfaded36a04c8b38ecdb8f414ae0c1e41da7b9fd37494d33a548aad39232. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BER180929405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccee98c16152f65785315e0da95764f646531f35293c65d08187157a48e9199. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BER180929418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b971269b2eb15695374da84188c65c6c9f2872bf984c972a134695e3a9aee82. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BER180929409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e1202e735a3a12a3e359b2a067cdaeb6645a45785e2145afbbb723cda027f7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BER180929410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd9ed0ad9e9906b8319f869f9e620ec561fbd3ec9c811b1ed37620fa90ecf38. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BER180929412.
Pavane "M'amye est tant honneste" - Gaillarde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334b88477ce1b8f172f4d308a38cdccd5987d5884261d6ab6ae581aba133c33e. 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/BER180929422.