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 0xbb3f3682014f7498c2a06441904f6895fb4181d91a41f9f0e2978f235a77eff9. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd5b5e7a-28f5-4d0e-ba69-f47c4a16b650.json and https://artists.proofprofile.net/proofs/artist/cd5b5e7a-28f5-4d0e-ba69-f47c4a16b650.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Renaissanceflöte (The Renaissance Flute)
Canzoni overo sonate concertate per chiesa e camera, Op. 12: No. 19, Ballo detto Eccardo
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 0xa7c6da84f67c33de734ab1fd236c41d1c8780196181a67a4782ab246393c702c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR50X2292704.
Sinfonie et gagliarde, Libro 1: Gagliarda detta la Norsina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531904bdd91244f44d4e2e210072dd29e7249dc6ddabdf99b56e9283bcde92f1. 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/FR50X2292715.
Fontana: Sonate a Violino ed Altri Strumenti
Partite sopra diverse sonate: Passa Galli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca87fe91b619eafe22f708aa06e3dc7890e6ec3ff1fcd3c20e417fa44bf5154. 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/DEE472000038.
The Age of Extravagance: VIrtuoso Iberian & Italian Cornett Music
The Collected Recordings of Il Giardino Armonico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6ab9b9cef494ffcd88f506801024f4111b9b6fcc3a45f3de2e4255d036b9f1. 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/DEA800013901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3c468e92ed63c816a62794d7d01c0b25b7a38ec221278f7221524cc86cd277. 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/DEA800014500.
Scarlatti, D: Mandolin Sonata in D Minor, Kk. 90: I. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171cea659eff0b50e1f8af27d7c3f665bab67d7b17088d0323a47447a21e07df. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:16:43Z), 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/DEA809316101.
Corelli: Concerto grosso in G Minor, Op. 6 No. 8 "Fatto per la notte di Natale": III. Adagio - Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438e08101944a166e55eea8eddd68a845adf096040fb71515960a8f93c5d2236. 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/DEA809100211.
Italian Music of the Seventeenth Century
Dolce accenti, passaggi e legature: Florid Italian Solo Music Around 1600
Sonate, arie et correnti, Op. 3: No. 5, La Bergamasca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ed0ffb1a7e825dbb31df97fc9805837f79c0737785c76c1b23cfd958c25969. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRZ140810040.
Recorder Concert (Italian): Haupt, Ekart – Fontana, G.B. / Mancini, F. / Vivaldi, A, / Bellinzani, P.B. / Barsanti, F. / Veracini, F.M.
Perla Barocca: Early Italian Masterpieces
18 Sonatas in 1, 2, 3 Parts: Sonata No. 2 in D Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d7ac6a0e6449270dc665f000e95e2387f777d4262ceb9adae36c89d7780005. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:39:33Z), 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/NLA460912757.
Sonate concertate in stil moderno, libro 2: Sonata No. 2. Alegra - Adagio - Alegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba54361e6ce5fb514637f543d8320a5076dd1afbbe66bb60bf43741432428ea9. 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/NLA460912760.
Violin Sonata in D Minor, Op. 16 No. 12: I. Adagio - II. Allegro e presto - III. Vivace e largo - IV. Spiritoso - V. Aria. Allegro - VI. Veloce
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8010b65c928ccb23b4a0f28bd529824f9fe01ecdf244e3d93b42be000a4854b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA460912764.
Early Italian Chamber Music - Works for Recorder and Basso Continuo
An Italian Ground: Baroque Instrumental Music in the Italian Style
Trombone Grande: Music for Bass Sackbut around 1600
Sinfonia decima settima a quatro violini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035eecd59532a55fd0991f391321a8818f6b6743fbd3df19d4b2de65ff54d1ae. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BER181840401.
Pulchra es: Affetti in 17th-century Italian Instrumental Music
Dario Castello, Giovanni Battista Fontana: Sonate concertate in stil moderno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786f8b7f0f71f1891ff860b6c0cfd5276d42ea0b15f22943c258d6ff80d0fbb9. 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/GBEBL1922002.
Cornet Music - Merula, T. / Rore, C. / Gabrieli, A. / Frescobaldi, G.A. / Palestrina, G.P. / Crecquillon, T.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cdac7fe9b2ee533a99bb50279f4094d7cc23a802606beb0ec75b51c5caa97a. 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/DECP69103007.
Fontana: Complete Sonatas for Violin and B.C.
Pachelbel Canon and Other 17th Century Music for Three Violins (Original Version)
17th Century Courts of Northern-Italy Music for Violin & Organ
Notari & Fontana (Early Baroque Music from the Basilica di Santa Barbara, Mantua)