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 0x5403bb4fbba1b9243b245c90142bfcb58926b1be298c0975a8a947ef66d98f78. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08e35fd8-a5fc-4a6b-9f69-4436f6f678c0.json and https://artists.proofprofile.net/proofs/artist/08e35fd8-a5fc-4a6b-9f69-4436f6f678c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Guitar Quintet in D Major, G.448: IV. Fandango
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 0xcd13fe0f49c3529fa0e83f68931a280612e26db4bf7eb99d03a24ff681fc190f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRU622052414.
Passion selon saint Jean, BWV 245: Herr, unser Herrscher
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Stabat Mater: XII. Quando corpus morietur
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Stabat Mater Pour Contre-ténor Et Orchestre en Fa Mineur, RV 621: Stabat Mater dolorosa
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Stabat Mater Pour Contre-ténor Et Orchestre en Fa Mineur, RV 621: Eja mater
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Cantate "Ich Hatte Viel Bekümmernis" BWV 21: Sinfonia
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Sonata seconda en Sol Mineur, TWV 43:g1: III. Largo
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Sacred Aria: I. Ach wie sehnlich wart' ich der Zeit
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Concerto pour clavecin en Fa mineur, BWV. 1056: II. Largo
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Concerto en La Majeur pour hautbois d’amour, cordes et basse continue BWV 1005: II. Larghetto
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Messe en si mineur, BWV 232: V. Crucifixus etiam pro nobis
Ensemble Vocal et Instrumental de Lausanne
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Tombeau de Sa Majesté la Reine de Pologne, BWV 198: Laß, Fürstin, laß noch einen Strahl
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Cantate «Christ lag in Todesbanden», BWV 4: Versus II. Den Tod niemand zwingen kunnt
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Quartet No. 2 in D Major, Op. 8, W.B 52: I. Andante. Rondo Allegro
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Quartet No. 2 in D Major, Op. 8, W.B 52: II. Rondeau. Allegro assai
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Vivaldi, Leclair & Locatelli : Violin Concertos
Prelude in A Minor, based on Violin Concerto, RV. 355
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Violin Concerto in A Minor, Op. 7 No. 5: I. Vivace
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Violin Concerto in A Minor, Op. 7 No. 5: II. Largo - Adagio
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Violin Concerto in A Minor, Op. 7 No. 5: III. Allegro assai
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Violin Concerto in B Minor, RV. 384: I. Allegro
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Violin Concerto in B Minor, RV. 384: II. Largo
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Violin Concerto in B Minor, RV. 384: III. Allegro
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Violin Concerto in E Minor, Op. 3 No. 8: I. Andante - Cappriccio
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Violin Concerto in E Minor, Op. 3 No. 8: II. Largo
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Violin Concerto in E Minor, Op. 3 No. 8: III. Allegro - Cappriccio
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Violin Concerto in D Major, Op. 10 No. 3: I. Allegro moderato
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Violin Concerto in D Major, Op. 10 No. 3: II. Andante
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Violin Concerto in D Major, Op. 10 No. 3: III. Allegro ma non tropo
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Prelude in C Major, based on Trio Sonata RV. 60
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Violin Concerto in C Major, RV. 179a "Per Anna Maria": I. Allegro ma poco
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Violin Concerto in C Major, RV. 179a "Per Anna Maria": II. Largo
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Violin Concerto in C Major, RV. 179a "Per Anna Maria": III. Allegro (Unpublished)
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Leçons de ténèbres, Troisième Leçon à deux voix: I. Jod
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Leçons de ténèbres, Troisième Leçon à deux voix: VI. Jerusalem
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Six quatuors à Violon, Flûte, Viole et Basse Continue, Sonata No. 2 in A Major, TWV43:e4: I. Soave
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Six quatuors à Violon, Flûte, Viole et Basse Continue, Sonata No. 2 in G Minor, TWV 43:g1: III. Largo
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Les Nations, premier ordre "La Françoise": I. Sonade (Gravement - Gayement - Rondement - Gayement - Gravement - Vivement - ir, gracieusement - Gayement)
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Couperin & Colin de Blamont: Concert chez la Reine
27 Pieces for Bass Viol, WK 186-212: IX. [Prelude] in D Major, WKO 194
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J.C. Bach: Quartet Op. 8 No. 2: II. Rondeau. Allegro Assai
Vivaldi: Violin Concerto in B Minor, RV. 384: II. Largo
La Folle Journée 2019: Carnets de voyage
La vida breve: 1ère Danse espagnole (Adaptation M. Laignelot)
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Stabat Mater, RV 621: I. Stabat Mater dolorosa
Nisi Dominus, RV 608: IV. Cum dederit dilectis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5768de9a4eee0913c2900ec73234a2e1bc5aea14dedd276fb2236fbea17a0c61. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/FRU621323604.
Concerto Pour Harpe No. 1 en Si Majeur, Op. 4 No. 6: I. Andante - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ccbfa64ddc2a0d00af57786f6c272fb33f67341308109c0ce764c86b4fef71. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRU620500913.