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 0x182660e27bf197f3a963296f4691d879610c10aeebd7c615a8d4562d9d02140e. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a25c1fed-c71d-4d2b-9fb4-94c27db776a5.json and https://artists.proofprofile.net/proofs/artist/a25c1fed-c71d-4d2b-9fb4-94c27db776a5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Scarlatti: Sonatas Played on 5 Different Instruments
C.P.E Bach: Sonatas for Viola da gamba & Harpsichord
Concerto for 2 Mandolins in G Major for Strings and Continuo, RV 532: I. Allegro
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 0x51e2b4bb8121a04952d65cf0773d019572f01d2e6bfcbe59f7b2c2425a382dc9. 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/NLY331003455.
Concerto for 2 Mandolins in G Major for Strings and Continuo, RV 532: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe487584adcb5a1c6fd267f67164db9373e95c2d0a2dc61240c75e3f54c27901. 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/NLY331003456.
Concerto for 2 Mandolins in G Major for Strings and Continuo, RV 532: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6fedd8c63f442653de0b28140cf4fa14e661d52a125e49aad4212ba44c4b13. 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/NLY331003457.
Concerto in C Major for Mandolin, Strings and Continuo, RV 425: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336caa24530b4e05c2109db350e67dfdd33bec70335c54b833b0cc52bd2c551f. 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/NLY331003458.
Concerto in C Major for Mandolin, Strings and Continuo, RV 425: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62776b5db98e41b7606ed096adab3899d324916de23cc4e2265c5ad7a0f0a157. 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/NLY331003459.
Concerto in C Major for Mandolin, Strings and Continuo, RV 425: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101cf048ae6a038429a1af0708ece8489fdca60e0845f81a8eebf44db88bbdb1. 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/NLY331003460.
Trio in G Minor for Violin, Lute and Basso, RV 85: I. Andante molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111074648192ad63705c53c4033a4f7ff11ffe9c031aeaa4ba41d50467c21540. 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/NLY331003461.
Trio in G Minor for Violin, Lute and Basso, RV 85: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f271d30071e76143f3a72ea7be46a663308aa53060c9e44e21e1f50a882c0c4. 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/NLY331003462.
Trio in G Minor for Violin, Lute and Basso, RV 85: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf04fc96a4a2c23d778a1cfe4549dea3ef775982e63336ae269e7893c815cdcc. 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/NLY331003463.
Concerto in D Major for 2 Violins, Lute and Basso, RV 93: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16011ae44dad049aa59828016be1904fa4b1dcdda77b15b5d64234096ad67fb5. 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/NLY331003464.
Concerto in D Major for 2 Violins, Lute and Basso, RV 93: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f1e22fa6f1cb528ae2df188b69de7c7b42e1fbc590e74ca2f187a2242038c7. 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/NLY331003465.
Concerto in D Major for 2 Violins, Lute and Basso, RV 93: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e6580ba6b278de95a46f14e2b1905819218365f442ebbc4b132342327346e8. 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/NLY331003466.
Trio in C Major for Violin, Lute and Basso, RV 82: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee4d4bcc1d4d9bbc45d9c8ac52fe88c8afd01942a2c8b234cb7c49d38caa488. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/NLY331003467.
Trio in C Major for Violin, Lute and Basso, RV 82: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51e39fd03eb79bbcefcda29daf8e47be1e43d05b90b21a6084eb8ceb709adf6. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:04Z), 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/NLY331003468.
Trio in C Major for Violin, Lute and Basso, RV 82: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2283339870029ff545a44b4cf39b535dbbca4028b4b0de88b66679b9219f6cc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:39:08Z), 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/NLY331003469.
Concerto in A Major for Harpsichord, Strings and Continuo, RV 780: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6085c5048ea96cc9f05aadef2120b6414b4610ec33cefa9df7b9ceaee4e9540d. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:40:12Z), 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/NLY331003473.
Concerto in A Major for Harpsichord, Strings and Continuo, RV 780: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ee9dce7c3e81e63f8675d2195e9d5a4512911a7cfe48e56d0b95e8aae0bda2. 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/NLY331003475.
Le otto stagioni: Stravinskij Chamber Orchestra Play Vivaldi & Piazzolla
A Cinque: String Sonatas between XVII & XVIII Century