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 0x1a25c95f21fbb3f0aac128663e18c181df2ab592bda72017d34d60e566dfea9d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3b8fb10-fc20-4c25-9b14-5984e1b55ea6.json and https://artists.proofprofile.net/proofs/artist/b3b8fb10-fc20-4c25-9b14-5984e1b55ea6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xb64dc53d399f4f762da7ecf306778a9554e7ff5b12f52a77db47a71e280d189b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAD432100901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf988ca7ec059b27f2ff836999eb752ca3d411fc5e7bc86d50c6db4e9bcb7ebb1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAD432100902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6af30477c05fc460dad67d31f5464d460a9254124ef40904386e874498afd63. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAD432100903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb7ff96ea4a35e8bc0ef34cadd6dec9cc88e6dc50521104d2eb3e5fdda6973b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAD432100904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f33331469f5ea88da902b272adf07c3db81e10b7b8c27f7fc186be6719153c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAD432100905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff732e0d5e56c85f7021caf6730fa48586a9210e9d81e94c031035efd09f573d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAD432100906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43aa9215530b88d5aa07d6108e29c50cad602a8c6ab06096872de81851324978. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAD432100907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf536c84c6f02c1a312fb564a26253d9d54d5e8a9e72d6f392b4d9c2fe86bfb4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAD432100908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbceaa8d24ae79ab42a904a632a02de75f2f11d26892dac301754cf3472b507c5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAD432100909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f0de346aacf20ae7ae00e18c83cc7e0a95d1fc35f14c432ebd96bd281dae8b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAD432100910.
Les Folies françoises: VI. La Persévérance, sous le Domino gris de lin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e7a9bff4904675dec9faa8eae2050e1af9e6eea4da8f031f4944ea11996772. 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/FR7MS1848021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298701f2ffe27071560ce4c52af8dda81ae662b8394ba801b34f22dc6c227cc9. 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/BEE641517201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2101477bd031de4519f8d6d62864fd469959c3912a595622f77bfc7e519b497f. 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/BEE641517202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094884645603c30022615e2cf729ce71de384e05ff2d3782444fe95b10300300. 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/BEE641517204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541b41c998feb872810892ad0c32c484d6eaae419263478ffca54204dc308dc4. 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/BEE641517208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f6fa9e2f45709f617ac7a7f5ba9ddb639a5abfaa43bda28303aacadf4f6e43. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BEE641517203.
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
Bach: Concertos pour Clavecin BWV 1052, 1053, 1055 & 1056
Boismortier: Suites for Harpsichord and for Flute