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 0xbd603e6fbf8d55a4c74e4a8135d136a418ff40d7efa16e953a6eb36f61ba5450. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edd31b99-5907-4e43-9240-29f386d39e05.json and https://artists.proofprofile.net/proofs/artist/edd31b99-5907-4e43-9240-29f386d39e05.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto for Traverso, 2 Violins, Violoncello and Continuo in G Minor, RV 107: I. Allegro
Vivaldi: Bizzarie Venetiane. Concerti per vari strumenti
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 0x2d8876e18f9b29ad16e7158fd154bf22ba963f0adf825ffc045348dd780a25cd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES7141500330.
Concerto for Traverso, 2 Violins, Violoncello and Continuo in G Minor, RV 107: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7058beeda26efcb9ac3dfcc4b64f42075d477c16404875ce46060c7fabc8f4. 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/ES7141500331.
Concerto for Violin, Violoncello, Organ, Strings and Continuo in C Major, RV 554a: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071f07357f55e9d1a51ed2b11bd05b8d9f40f0b30c2939db5a64e3854fe87a2f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES7141500333.
Concerto for Violin, Violoncello, Organ, Strings and Continuo in C Major, RV 554a: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56e882785c54266c586d799668b094f40d708d2c0b50c668025e0f3bd5d6a26. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES7141500334.
Concerto for Violoncello, Strings and Continuo in G Minor, RV 417: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831697de4cc2c2952e4c4d95c46a929c63f623d7459747b159cb0792d5710602. 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/ES7141500339.
Concerto for Traverso, 2 Violins, Violoncello and Continuo in G Minor, RV 107: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dc6d3cb2ba1d1c498ac8863738761fbe3f2780a3140ab3a22235a1f6757d41. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/ES7141500332.
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
Concerto for Violin, Violoncello, Organ, Strings and Continuo in C Major, RV 554a: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85177382b20603d5f2d3aa41a20399b836994c5dae3f66853a6b1e1703040dc8. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ES7141500335.
Concerto for Violoncello, Strings and Continuo in G Minor, RV 417: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1339b07050fd46c329987fa61f278d2a6b94ebb7779fc927045c1b61c1877b4. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/ES7141500340.
Concerto for Violoncello, Strings and Continuo in G Minor, RV 417: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144387205c6aab192c39f41c5e26ad40ba3492fe16ab8e25a94e9e6c090518d1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES7141500341.
Concerto for Traverso, Violin, Violoncello and Continuo in D Major, RV 92: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68473b4fff299bd7674c7a71ee746440479f78b58d92dda664a62da2be141bc1. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/ES7141500361.
Concerto for Traverso, Violin, Violoncello and Continuo in D Major, RV 92: II. Aria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ed22de97fe76fd5d5843d1441769e161d0bbd0c10a80cfc75a9e21412d3aa5. 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/ES7141500362.
Concerto for Traverso, Violin, Violoncello and Continuo in D Major, RV 92: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de6717a570d5d0038f19e3ed1d2db3f5630acd00ad669c18ebbcb70954b29eb. 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/ES7141500363.