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 0x118ea46bf9962b968616e54a754218099defce1d04533dc73dca6c56bf30f4d7. 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/3366959b-77f6-4cb4-862b-4b347421e88c.json and https://artists.proofprofile.net/proofs/artist/3366959b-77f6-4cb4-862b-4b347421e88c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Concerto For 2 Trumpets In C Major, RV 537: 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 0x566160686e20d6f277cb53dcc55cc17314e404c21827b8dd537f6f2260c21e50. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/HKI199706801 — a six-check JSON result.
Concerto For 2 Trumpets In C Major, RV 537: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b30dfaa0b9c170eac38bdbbee6011101676fa4dab85582d8b502cf92063e07f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199706802 — a six-check JSON result.
Concerto For 2 Trumpets In C Major, RV 537: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf39080f483b5bacf8c67f6edc9f934e96ee3390ccacd0513f4b643980313c8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HKI199706803 — a six-check JSON result.
Oboe Concerto In A Minor, RV 461: I. Allegro Non Molto
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Oboe Concerto In A Minor, RV 461: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef75ab0a9ad11276f6c027fb0e06779e834aefe978ad538e168a00dc0be32d2. 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/HKI199706805 — a six-check JSON result.
Oboe Concerto In A Minor, RV 461: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b1fc0d9938a8aa157ab245781f9d08515d36141e57cea30681252e8af20dfd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/HKI199706806 — a six-check JSON result.
Violin Concerto In A Minor, Op. 3, No. 6, RV 356: I. Allegro
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Violin Concerto In A Minor, Op. 3, No. 6, RV 356: II. Largo
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Violin Concerto In A Minor, Op. 3, No. 6, Rv 356: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb7825b4d0ba8a9255622374662dd5f442a8ebafcc27d2202ac71a265ff0e20. 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/HKI199706809 — a six-check JSON result.
Sinfonia For Strings In D Major, RV 122: I. Allegro
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Sinfonia For Strings In D Major, RV 122: II. Largo
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Sinfonia For Strings In D Major, RV 122: III. Presto
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Oboe Concerto In C Major, RV 447: I. Allegro Non Molto
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Oboe Concerto In C Major, RV 447: II. Larghetto
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Oboe Concerto In C Major, RV 447: III. Minuetto
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Cello Concerto In G Major, RV 413: I. Allegro
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Cello Concerto In G Major, RV 413: II. Largo
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Cello Concerto In G Major, RV 413: III. Allegro
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Concerto For 2 Violins In A Minor, Op. 3, No. 8, RV Rv 522: I. Allegro
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Concerto For 2 Violins In A Minor, Op. 3, No. 8, RV 522: II. Larghetto E Spiritoso
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Concerto For Strings In G Major, RV 151, "Alla Rustica": I. Presto
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Concerto For Strings In G Major, RV 151, "Alla Rustica": II. Adagio
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Concerto For Strings In G Major, RV 151, "Alla Rustica": III. Allegro
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Concerto For 2 Mandolins In G Major, RV 532: I. Allegro
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Concerto For 2 Mandolins In G Major, RV 532: II. Andante
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Concerto For 2 Mandolins In G Major, RV 532: III. Allegro
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Vivaldi: Concerti per fagotto, archi & continuo
The Four Seasons: Violin Concerto in E Major, Op. 8, No. 1, Rv 269, "la primavera" (Spring): Ii. Largo e pianissimo sempre
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Cello Concerto in C Minor, Rv 401: Ii. Adagio
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Concerto for 2 Oboes in C Major, RV 534: II. Largo
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Verdi - Respighi - Puccini & Rossini: Opere per Orchestra
Le Quatro Stagioni, L'inverno - Winter, I - Allegro non molto
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The Wasps, Aristophanic Suite: III. March Past of the Kitchen Utensils
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Overture (Suite) in C Major, TWV 55:C6: VII. Gigue (Signaturmelodin till antikrundan)
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Vivaldi: Violin Sonatas, Op. 2 Nos. 7-12
Violin Sonata in A Minor, Op. 2 No. 12, RV 32: II. Capriccio. Presto
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Vivaldi: La stravaganza, Op. 4 Nos. 7-12
Vivaldi: L'estro armonico, Op. 3 Nos. 1-6
Veracini: Overtures and Concertos, Vol. 2
Concerto for Strings in G Minor, RV 157: III. Allegro
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Serenade Nr. 13 KV 523 "Eine Kleine Nachtmusik": I. Allegro (Mozart)
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Veracini: Overtures and Concertos, Vol. 1
3 Gymnopédies: Gymnopedie No. 1 (arr. for harp)
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Orchestral Suite No. 3 in D Major, BWV 1068: Bach - Overture (Suite) No. 3 in D Major, BWV 1068: II. Air, "Air on a G String"
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3 Gymnopédies: Gymnopedie No. 3 (orch. C. Debussy)
Orchestre Symphonique et Lyrique de Nancy
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27, No. 2, "Moonlight": I. Adagio sostenuto
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Piano Sonata No. 8 in C Minor, Op. 13, "Pathetique": II. Adagio cantabile
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Concerto for 2 Violins in A Minor: Larghetto e spirituoso
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The 4 Seasons: Violin Concerto in E Major, Op. 8, No. 1, RV 269, "La primavera" (Spring): The Four Seasons, Spring: Largo e sempre pianissimo
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The 4 Seasons: Violin Concerto in G Minor, Op. 8, No. 2, RV 315, "L'estate" (Summer): The Four Seasons, Summer: Adagio
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Concerto in D Major, RV 90, "Il gardellino": Flute Concerto in D Major: Il gardellino - Largo
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Chamber Concerto in D Minor, RV 96: Flute Concerto in D Minor: Largo
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The 4 Seasons: Violin Concerto in F Major, Op. 8, No. 3, RV 293, "L'autunno" (Autumn): The Four Seasons, Autumn: Adagio molto
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The 4 Seasons: Violin Concerto in F Minor, Op. 8, No. 4, RV 297, "L'inverno" (Winter): II. Largo
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Violin Concerto in A Major, RV 344, "Dresden Concerto": Dresden Concerto in G Major: Adagio
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Concerto for 2 Mandolins in G Major: Andante
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Viotti: Violin Concerto No. 23 / Sinfonie Concertanti
Vivaldi: Violin Concertos, Op. 6 Nos. 1-6
Bonporti Edition, Vol. 5 - Chamber Sonatas
Bonporti Edition, Vol. 3 - Concertos A 4, Nos. 1-10
Bonporti Edition, Vol. 2 - Chamber Sonatas
Bonporti Edition, Vol. 1 - Motets for Solo Voice
Vivaldi: Opera II - Sonate 1/6 per violino e basso continuo
Bassoon Concerto in C Major, RV 468: I. Allegro
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Bassoon Concerto in C Major, RV 468: II. Andante
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