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 0xc51b78c0d825f58a8ef3bc3cd6095f7670fc4255173ba2e6d2e805637a1b3644. 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/b1347005-e031-46c4-8db1-428dcc84b912.json and https://artists.proofprofile.net/proofs/artist/b1347005-e031-46c4-8db1-428dcc84b912.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Legnani: Caprices / Giuliani: 3 Giulianate / Diabelli: Sonata In F Major / Paganini: Sonata In A Major etc
Guitar Concerto No. 1 in A major, Op. 30: 1. Allegro maestoso
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 0xbaf099f7fc55720337b4de4811fab846173170d7e9720a44c827b8e2d024b5d6. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:41:50Z), 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/GBF078610781.
Guitar Concerto No. 1 in A, Op. 30: 2. Andante siciliano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720e82b8ddcf63341150ddedab1027ed93774021a52a1a9079d37c807cc4a9d5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBF078610782.
Concerto for Lute, 2 Violins and Continuo in D major, RV 93: 1. Allegro giusto (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cf87a79e05baf9bacfe4630e1f7cfa15e9e9ef111423573c8fc9f2a5f3b34d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBF078610791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe000cac5fafcd3d2a83643c35ccef23be5435ece5da98c0320c7d223a26a1aca. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/GBF078610941.
Ponce/Villa-Lobos/Lamarque-Pons: Guitar Concertos
Ponce: Variations & Fugue On "La Folia" / Brouwer: The Black Decameron / Lamarque-Pons: Sonatina etc
Arnold: Guitar Concerto / Brouwer: Retrats Catalans / Chappell: Caribbean Concerto
Scarlatti: 9 Sonatas / Rameau: Premier livre de pièces de clavecin (excerpts)
La Danza! Guitar Music From Latin America
Rodrigo/Giuliani/Ponce/Arnold etc.: Guitar Concertos (2 CDs)
Rodrigo/Giuliani/Ponce/Arnold etc.: Guitar Concertos
Bach, J.S.: Lute Suites (Arr. for Guitar)
Guitar Recital: Fernandez, Eduardo - Mertz, J. / Sor / Aguado / Regondi
Guitar Recital: Fernandez, Eduardo - Tirao / Barrios / Piazzolla / Montana, G. / Guastavino / Rodriguez, M.
Suite Colombiana No. 4: I. Nostalgia Bogotana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae91c163010df483365b80ca9995a46875cef1ad5d5fbf0d10ed52c0e053dc6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEU920434711.
Concerto for Lute, 2 Violins and Continuo in D major, RV 93: 2. Largo (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a4c9c800fb22024c780af6b47f754123bd583f8cadb536b7413dd7cad22d4c. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBF078610792.
Suite in E for Lute, BWV 1006a/1000 - Arr. for Guitar: 5. Bourrée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7d4f239bcfbed6c83c3ebf4e88af5b4b2fd724f6630b125e1c3f9d2ef1f260. 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/GBF078711525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a4c9c800fb22024c780af6b47f754123bd583f8cadb536b7413dd7cad22d4c. 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/GBF078610792.
Concerto for Viola d'amore, Lute, Strings and Continuo in D minor, RV 540: 2. Largo (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ec9705566f6793ebf25879e53028aaacf37a2ce728c28d48fcf347e55061d8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBF078610802.
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
Sonata for Lute, Violin and Continuo, RV 82: 2. Larghetto (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f6ed74ae4aad54f3b7eadc2cb98e2d7253faf4d8807049149a4a0683a928f7. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBF078610812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d515c19bcc915985d58b459d7999e56469f0cfa41bab7a90f56acd347ac3e1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBF078711560.
Partita No. 1 in B flat, BWV 825 - Arr. Guitar (D major): 1. Praeludium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0687473913032b055b413e64b3eabf349f52857e32d196c02fa6ffbb67d8009. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBF078711531.
Sonata for Lute, Violin and Continuo, RV 82: 3. Allegro (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97680947675cba4766c489ceedb87bdbad63ad3fa561767b0018de829be5bcf0. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBF078610813.
Suite in G Minor for Lute, BWV 995 - Arr. for Guitar (A Minor): 3. Courante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9685fd7cb811da9f0271c5ec3013155a6d20415c468054724cfbe561e738ef6f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBF078711513.