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 0x3067a6e328d28ffe7e4d521c0b70104b0fa563843f29e6e413f9d762ed02b8da. 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/21f3ffd1-f576-447d-9f15-b346dfd86f73.json and https://artists.proofprofile.net/proofs/artist/21f3ffd1-f576-447d-9f15-b346dfd86f73.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach, C.P.E.: Cello Concertos, Wq. 170-172
J.S. Bach: Goldberg Variations arranged for Violin, Guitar & Cello
Goldberg Variations, BWV 988: Aria (Arr. for Violin, Guitar & Cello by David Juritz)
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 0x589d1cf7aab6b235dee4d3b96232f24f2f2b6eaec547912a9e6770bf8faecc7e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU2100174.
Goldberg Variations, BWV 988: III. Variatio 3. Canone all' Unisuono a 1 Clav (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd6fedad991f6be6f16f5aff6f25fdfbe3ace1ead5b58f04a27814a8e3f3158. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAJU2100177.
Goldberg Variations, BWV 988: V. Variatio 5. 1 ô vero 2 Clav (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf937b3999b436f907f7e40e50f0f2d0d9f883689311afd2e4666769db09ba0dd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBAJU2100179.
Goldberg Variations, BWV 988: VI. Variatio 6. Canone alla Seconda. a 1 Clav (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751ebd228f46c31bf0644b2f527c7ea03430ca64d4ad4fb03a7d0b5fb7eb3b2f. 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/GBAJU2100180.
Goldberg Variations, BWV 988: VII. Variatio 7. a 1 ô vero 2 Clav. al tempo di Giga (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7c58345f243dfdcece2d26d051e69dd0e28715285e8e41d66eb2d320336bcb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAJU2100181.
Goldberg Variations, BWV 988: VIX. Variatio 9. Canone alla Terza. a 1 Clav (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe56a9ea840842039c02eb3489da37e399b6b6044d28e1e54e55bb8675526ed. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU2100183.
Goldberg Variations, BWV 988: X. Variatio 10. Fughetta. a 1 Clav (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f4dc78bbebcf32893c4ab8376afe5dcbf88c0aa3f8d1d21d760c9a0a704f22. 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/GBAJU2100184.
Goldberg Variations, BWV 988: XIII. Variatio 13. a 2 Clav (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb081be90ce0bc37c07ef7098f109403284d75ff747ff6aec134d6952949cdd0d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAJU2100187.
Goldberg Variations, BWV 988: XV. Variatio 15. Canone alla Quinta. a 1 Clav (in moto contrario) andante (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30af8b2dd5f60edd043c546441c5526d04d08b5d412a4859b8457238480df156. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAJU2100189.
Goldberg Variations, BWV 988: XXV. Variatio 25. a 2 Clav. Adagio (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b227adbf288af9c9c0194d75c93cb56f315f96d03cb568ff70e7ef4a3a1a9d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU2100199.
Goldberg Variations, BWV 988: Aria da capo (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47596a3e585908eb9f48153c53d21156c60ded693d91019a1ce91f44c140aa04. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAJU2100205.
Goldberg Variations, BWV 988: I. Variatio 1. a 1 Clav (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611b4f14abeece8edeb0926cd8cd728d3830c2b55462b0dffbebbe1e864e3d38. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/GBAJU2100175.
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
Goldberg Variations, BWV 988: II. Variatio 2. a 1 Clav (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec71448a45480642a6de4d0772780ec7b69eb7731bc40de378942b1aa8e2f762. 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/GBAJU2100176.
Goldberg Variations, BWV 988: IV. Variatio 4. a 1 Clav (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763d1efb114545d9da4dfbe93d330032a8cef2681f5e5d82cf105694736af1a8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBAJU2100178.
Goldberg Variations, BWV 988: VIII. Variatio 8. a 2 Clav (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed612071695f59a31ca7148de940ce483d7cdb358d90577347b3980e933a50e5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU2100182.
Goldberg Variations, BWV 988: XI. Variatio 11. a 2 Clav (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be6dee2ec21dc8700246242f0c8adc36150e8aebd6586307dde18d78d702f46. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJU2100185.
Goldberg Variations, BWV 988: XII. Variatio 12. Canone alla Quarta. a 1 Clav (Arr. for Violin, Guitar & Cello by David Juritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5fb0a40b6db72cb01e1523cc6b4f016ec8ad5972b6e1b65008534d6f9ea58a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBAJU2100186.
Beethoven: Piano Concerto No. 2 & Triple Concerto (Bonus Track Version)
Beethoven: Complete Concertos for Piano and Orchestra
Brahms: Viola Sonatas Nos. 1 & 2, Op. 120; Viola Trio, Op. 114
Viola Sonata in F Minor, Op. 120 No. 1: III. Allegretto grazioso
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Trio for Viola, Cello & Piano in A Minor, Op. 114: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831fe2a516d8ee1f66a4c98053c116ca4a4bd32b71883d9eff17958202bd5e05. 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/GBAJY0758406.
Viola Sonata in E-Flat Major, Op. 120 No. 2: I. Allegro amabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d64a7f8868189c6b2a6f461dd5f12ec74a6d93faae8a6cd61ee4c1b74b59a85. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAJY0758409.
Viola Sonata in E-Flat Major, Op. 120 No. 2: II. Allegro appassionato
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Viola Sonata in E-Flat Major, Op. 120 No. 2: III. Andante con moto – Allegro non troppo
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Trio for Viola, Cello & Piano in A Minor, Op. 114: I. Allegro
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Trio for Viola, Cello & Piano in A Minor, Op. 114: III. Andantino grazioso
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Trio for Viola, Cello & Piano in A Minor, Op. 114: IV. Finale. Allegro
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Beethoven: Symphony No. 7 & Triple Concerto
Cello Suite No. 1 in G Major, BWV 1007: I. Prelude
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Cello Suite No. 1 in G Major, BWV 1007: IV. Sarabande
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Cello Suite No. 4 in E-Flat Major, BWV 1010: VI. Gigue
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Cello Suite No. 5 in C Minor, BWV 1011: I. Prelude
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Cello Suite No. 5 in C Minor, BWV 1011: II. Allemande
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Cello Suite No. 6 in D Major, BWV 1012: IV. Sarabande
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Cello Suite No. 4 in E-Flat Major, BWV 1010: I. Prelude
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Cello Suite No. 1 in G Major, BWV 1007: III. Courante
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Cello Suite No. 6 in D Major, BWV 1012: I. Prelude
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Britten: Violin Concerto / Cello Symphony
Boccherini: Cello Concertos Vol. 1. Nos 1-4
Cello Concerto No. 1 In C Major, G. 477: I. Allegro
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Cello Concerto No. 1 In C Major, G. 477: II. Largo
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Cello Concerto No. 1 In C Major, G. 477: III. Allegro
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Cello Concerto No. 2 In D Major, G. 479: I. Allegro
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Cello Concerto No. 2 In D Major, G. 479: II. Adagio
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Cello Concerto No. 2 In D Major, G. 479: III. Allegro
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Cello Concerto No. 3 In G Major, G. 480: I. Allegro
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Cello Concerto No. 3 In G Major, G. 480: II. Adagio
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Cello Concerto No. 3 In G Major, G. 480: III. Allegro
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Cello Concerto No. 4 In C Major, G. 481: I. Allegro Moderato
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Cello Concerto No. 4 In C Major, G. 481: II. Adagio
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Cello Concerto No. 4 In C Major, G. 481: III. Allegretto
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The Grainger Edition, Vol. 9 - Works for Chorus & Orchestra 3
Bliss: Cello Concerto / Music for Strings / Two Studies
Grieg: Sonata for Cello & Piano in A Minor
Jenkins: The Armed Man: A Mass for Peace: Benedictus
The Armed Man: A Mass for Peace: Benedictus
Schola Cantorum of The Cardinal Vaughan Memorial School
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Goldberg Variations, BWV 988: XIII. Variation 13 (arr. David Juritz)
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Goldberg Variations, BWV 988: XXV. Variation 25 (arr. David Juritz)
Goldberg Variations, BWV 988: XX. Variatio 20. a 2 Clav (Arr. for Violin, Guitar & Cello by David Juritz)
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