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 0xfa027b415f8131f6562251b5792998a4655e514c026af30b04b5329aa2b4f81d. 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/75a6a73e-08db-41fe-8645-27216d06ee4b.json and https://artists.proofprofile.net/proofs/artist/75a6a73e-08db-41fe-8645-27216d06ee4b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Boccherini: Cello Concertos, Stabat Mater & Quintet
Concerto pour violoncelle No. 6 en ré majeur, G. 479: 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 0x133ceb7c94a8407aba5fd396d6412c74fa8004bd4d4a922640c643387b3b0223. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61819401 — a six-check JSON result.
Concerto pour violoncelle No. 6 en ré majeur, G. 479: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55076c3019714c00b769aac02b4ca45653399eb72598abba14e79fcb2673170. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61819402 — a six-check JSON result.
Symphonie No. 6 en Ré Mineur, G. 506 "La Casa del Diavolo": I. andante sostenuto - Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f740ceb25f3679895d7dc9229a06493fd35181badfbcd6668c55680a848cb89. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61819404 — a six-check JSON result.
Symphonie No. 6 en Ré Mineur, G. 506 "La Casa del Diavolo": II. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d969924c93e6765476b23da0d9d9256474aa59929854c95e3b8e1fffa40b50. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61819405 — a six-check JSON result.
Symphonie No. 6 en Ré Mineur, G. 506 "La Casa del Diavolo": III. Andante sostenuto - Allegro con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44e6cac31537e68c5d3d0d14daba2e376ae132886d6e5113312a46ca2dd1445. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61819406 — a six-check JSON result.
Concerto pour violoncelle No. 9 en Si-Bémol Majeur, G. 482: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5284ee30fbdbc57b755c1cd8e64b6aef1abe1a8f99a0d6b8bd3709596e0e11. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61819407 — a six-check JSON result.
Concerto pour violoncelle No. 9 en Si-Bémol Majeur, G. 482: II. Andantino grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffd28196afdd4e9ecb205f0027232e74cc3f4f3cde4910fb085fbddfc0067c6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61819408 — a six-check JSON result.
Concerto pour violoncelle No. 9 en Si-Bémol Majeur, G. 482: III. Rondo allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0db598d499bcf4a4ae336eb6cac712f8da1dd3078e392a8429e94d5c83178c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61819409 — a six-check JSON result.
Quintette à cordes No. 6 en Ut Majeur, G. 324, Op. 30 "La Musica Notturna delle Strade di Madrid": III. Minuetto dei ciechi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605ebe92ff2c2cbcdfc01e248fa718abb6e1d89fc11b6ea0e93271d408439e40. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61819412 — a six-check JSON result.
Quintette à cordes No. 6 en Ut Majeur, G. 324, Op. 30 "La Musica Notturna delle Strade di Madrid": IV. Il rosario. Largo assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3f48ac026e358a36e55d9dd897692e3fc065a9007d997b4d6a6efcbf5872a4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61819413 — a six-check JSON result.
Quintette à cordes No. 6 en Ut Majeur, G. 324, Op. 30 "La Musica Notturna delle Strade di Madrid": V. Los Manolos (Passa calle). Allegro vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6c3d18dac67cd89d8093d84bc955729c509742777c6deb70a5e060fdf349d8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV61819414 — a six-check JSON result.
Trattado de Glosas: Recercadas ottava y quarta sobre 'La Folia'
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Ayres for the Violin, Book I (Arr. for Violoncello Piccolo): Preludio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6072dcf813201749cdb8c4d60f7abf270ebf4751134a0e05cb038c2e8e03fbb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62332602 — a six-check JSON result.
Ayres for the Violin, Book I (Arr. for Violoncello Piccolo): Scaramuccia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd721838aeb6ba0ed1af11245f66e200ecebb57c587144fa30033e6afe6fbaca7. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62332603 — a six-check JSON result.
Il primo libro di Canzone (Arr. for Violoncello Piccolo): Su corrente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4402a6afaa76dec61b2ec9cdcb696cbd9bda36c514c6c9797363b48a9721d2e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62332605 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e212b47dbc2f6c528a1b1850c7f7a48ebce60ab75dcf8f9bb2bf2e83b7327b2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62332606 — a six-check JSON result.
Cello Sonata No. 1 in D Minor: III. Largo
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Cello Sonata No. 1 in D Minor: IV. A tempo giusto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3365dcb1a40f1a13c69a5c450f56f01b3cc56d8d197be1cb2a59bbede89149be. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62332609 — a six-check JSON result.
San Ermenegildo: "Saprò ben con tanto piangere"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1caf8e7665c9770a023069c1077de8f19019d61707e997a4fda12229013b8b04. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62332610 — a six-check JSON result.
Cello Concerto No. 1 in F Major: I. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f00aa2c6c05a00db98cd2e48a757d3e4da17f1702416ea319597f4f51752c8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62332611 — a six-check JSON result.
L'isola disabitata: "Non turbar quand'io mi lagno"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1a08402836e62ec7e8f0aafe33b25de36e57c76ca95ef39409bd77eab596da. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62332615 — a six-check JSON result.
Ifigenia in Aulide: "Tu, spietato, non farai"
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Tarentella 'La vallubrella' (Arr. for Violoncello Piccolo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203af28806d7a11705058e760bb08be89a69635275eb233f120e6d0e2e54c14d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62332621 — a six-check JSON result.
James Oswald: She's Sweetest When She's Naked
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Concerto grosso in D Major, Op. 6 No. 4: II. Adagio
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She's Sweetest When She's Naked (Solo Version)
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Concerto Grosso No. 5 in D Minor (After Domenico Scarlatti): I. Largo
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Concerto Grosso No. 12 in D Minor, H.143 'La Folia' (After Corelli Violin Sonata, Op. 5 No. 12)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa990c210cddea0902be454772040f9596b955320c12408f4da2ef8d8c8cf8afa. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62127404 — a six-check JSON result.
Cello Concerto in G Major, INP 18: I. Adagio
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Cello Concerto in G Major, INP 18: II. Allegro
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Alcina, HWV 34, Act 3: Credete al mio dolore (Alcina)
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Cello Concerto No. 2 in G Major, Op. 14 No. 2: III. Rondo: Allegro
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Bach, C.P.E.: Cello Concerto in B-Flat Major; Symphonies in C Major & E Minor; Harpsichord Concerto in D Minor
Sinfonia No. 3 in C Major, Wq. 182/3: I. Allegro assai
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Cello Concerto in B-Flat Major, Wq. 171: I. Allegro
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Symphony in E Minor, Wq 178: I. Allegro assai
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Harpsichord Concerto in D Minor, Wq. 17: III. Allegro
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Bach, C.P.E.: Cello. Concertos; Symphony in B Minor; Trio Sonata in C Minor
Cello Concerto in A Minor, Wq 170: I. Allegro assai
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Cello Concerto in A Major, Wq. 172: III. Allegro assai
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Nicola Matteis: Scaramuccia (Arr. for Violoncello Piccolo)
Nicola Fiorenza: Cello Concerto No. 1 in F Major: III. Largo
Cello Concerto No. 1 in F Major: III. Largo
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Francesco Geminiani: A Treatise of Good Taste in the Art of Musick: The Night Her Silent Sable Wore
Nicola Porpora: Cello Concerto in G Major, INP 18: III. Largo
Charles Avison: Concerto Grosso No. 5 in D Minor (After Domenico Scarlatti): I. Largo
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