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 0x916c026c41684e76522401dc5ade2b569d1650fcdc6521e79385f684545952e5. 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/867e3c4e-7754-4402-93df-7434e19b27d3.json and https://artists.proofprofile.net/proofs/artist/867e3c4e-7754-4402-93df-7434e19b27d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piazzolla: Le Grand Tango (Musical Moments)
Rachmaninoff: Vocalise, Op. 34, No. 14 (Arr. Rose for Cello and Piano) [Musical Moments]
Vocalise, Op. 34, No. 14 (Arr. Rose for Cello and Piano) - Musical Moments
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 0x017b194cddb757dba51b960b93b24435cbcc78ec81ecea6e1d5f963909001069. 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/DEN962303040.
Poulenc: Les chemins de l'amour, FP. 106 (Transcr. for Cello and Piano) [Musical Moments]
Les chemins de l'amour, FP. 106 (Transcr. Han for Cello and Piano) - Musical Moments
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d533889b28fdc46e48e32d279bb2ae857e412dd8ecc3603fd57b7d3252e01d6. 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/DEN962301700.
Chopin: Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre (Arr. Franchomme for 4 Cellos)
Nocturne in B Minor, Op. post., Lento con gran espressione (Arr. for Cello and Piano by M. Maisky)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c44c345a8b9dbff7a6ab915fa4a93e07e3d075b94b48b4d7ea69e86ebdd2194. 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/FRUM72300820.
24 Préludes, Op. 28: No. 4 in E Minor (Arr. Franchomme for Cello) [Adapted for 4 Cellos by Matthias Spindler]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5092acb62ea05aeb5ad85197f928bbcd0abbe2958ccadc962dfd330a8e043468. 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/FRUM72300313.
24 Préludes, Op. 28: No. 4 in E Minor, Largo (Arr. for Cello and Piano by A. Franchomme) [Adapted by C. Thomas]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade76a00d4d8d706ec08d37e6312fbf0a3884f86b7e47d35a3d3f8abcb8c1003. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRUM72300821.
Piano Trio in G Minor, Op. 8: II. Scherzo. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d286db270bc95cb50b1280d8b1bc47db48946cb305bec09e158940d655a344. 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/FRUM72300633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcc8cb73df1bcea81b8fd46ad4acff0a77add25b8118caa2a3d5bea0fd28402. 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/FRUM72300314.
Piano Concerto No. 1 in E Minor, Op. 11: II. Larghetto (Arr. for Cello and Piano by J. Brocal and C. Thomas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8826e733570e6499afd29253d55179f66283775b218f856ae91bdaaa5eae2c34. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRUM72300822.
Waltz No. 19 in A Minor, KK IVb (Arr. for Cello and Piano by C. Thomas)
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Piano Trio in G Minor, Op. 8: IV. Finale. Allegretto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89486a9f13b6063013b2e303bdd4da11609620b9004a2a7e7c677297f189ea08. 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/FRUM72300319.
Nocturne in C Minor, Andante sostenuto, B. 108 (Arr. for Cello and Piano by C. Thomas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb87966d7c82dcb32dfa1388e8107a7736e37b086dd9ad9b17ed7261ca97b35. 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/FRUM72300825.
17 Polish Songs, Op. posth. 74: No. 2, "Spring" (Wiosna), B.116 (Arr. for Cello and Piano by C. Thomas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518a2803b2fd24e62cd6a259c832de27ae74cf3ab3948586297bd0ed248e8834. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300826.
Cello Sonata in G Minor, Op. 65: III. Largo
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Cello Sonata in G Minor, Op. 65: IV. Finale. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f544d83041d61f56b02c3eb9069c5ec7a03d09ef15ad5bb3a05fcf5920af04c. 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/FRUM72300639.
4 Mazurkas, Op. 68: No. 2 in A Minor, Lento (Arr. for Cello and Piano by C. Thomas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc66e6e7609b5155798836ec1df4424521b3de92734f37930ecae933d87ab8b7. 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/FRUM72300828.
Introduction and Polonaise, Op. 3: I. Introduction. Largo
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Air russe varié for Violoncello and String Quartet, Op. 32: I. Poco lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83aa502a8fe5b2e97aa33b5810060c627926a4194b8dd19424d97f86e630e808. 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/FRUM72300322.
12 Études, Op. 10: No. 6 in E-Flat Minor (Arr. for Cello and Piano by A. Glazunov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52c90cc21bfdaf2b1f2c65d8b66eae6168007acd6d0e1de2070d7f5196f8bbf. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRUM72300829.
Air russe varié for Violoncello and String Quartet, Op. 32: III. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51e112b594eb217bfade78ab3016275536b0cda4b6a046617271420d0e9c08c. 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/FRUM72300324.
Grand Duo concertant sur des thèmes de 'Robert le Diable' de Meyerbeer, B. 70: II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd277342302422c3d256198ba6e07f57eddb53f1e2b21f3e0ced4f1ef74ba99f7. 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/FRUM72300643.
Grand Duo concertant sur des thèmes de 'Robert le Diable' de Meyerbeer, B. 70: III. Andate cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fc9324c5249d2fef71fa10596ae69b47e8bcd08ee6c25fd77b942618bdbf09. 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/FRUM72300644.
Air russe varié for Violoncello and String Quartet, Op. 32: V. Allegro moderato
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Nocturne in E Minor, Op. posth. 72 No. 1 (Arr. for Cello and Piano by S. Taneyev)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597657ddefd1467596781d4f21cb7e7a30da1d17890b379b0996986cd7c47a59. 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/FRUM72300833.
24 Préludes, Op. 28: No. 20 in C Minor (Arr. Franchomme for 4 Cellos)
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Cello Sonata in G Minor, Op. 65: III. Largo "Souvenir" (Arr. Schmidt for Cello and String Quartet)
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Jane B. (After Chopin's Prelude No. 4 in E minor, Op. 28) [Arr. for Cello and Piano by J. Brocal and E. Daems]
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The Chopin Project : The Franchomme Legacy
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83aa502a8fe5b2e97aa33b5810060c627926a4194b8dd19424d97f86e630e808. 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/FRUM72300322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51e112b594eb217bfade78ab3016275536b0cda4b6a046617271420d0e9c08c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRUM72300324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe18ff706cadc925911e19def4881b511f24dfb0549713461e0d80c9f69cf67. 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/FRUM72300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c2980e98a9d2dc06f5a1f57c8ac39911ed800abda21d63f07e372548c87a6e. 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/GBDCA0300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64f7e7c720202ed35139a899774d5c32ba7ab10a956021afd9babdb452e5142. 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/ITB282100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d49a8528e6bbc1abd806577b7d5681fc7ed44fbacc3c39067a86708321c338d. 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/DEN961902441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002f31bdf7e674d1c661c3f0fa85b8d82a0880df0d1dd6ea7ce01c285125cdec. 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/DEN961900600.
Test Drive - From How To Train Your Dragon Music From The Motion Picture
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6 Moments musicaux, D. 780: No. 3 in F Minor. Allegro moderato
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6 Ländler for 2 Violins And Bass, WoO 15: No. 1 in D Major
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6 Ländler for 2 Violins And Bass, WoO 15: No. 2 in D Major
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3 Ecossaises, Op. 72 No. 3: No. 3 in D-Flat Major
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