1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x7b9e5e58b331ab9b6eac59d7fb562216841acb3ee9f92b49b40c748c25a7824a. 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/e6d5fc39-7871-41ac-bc65-4576e088c982.json and https://artists.proofprofile.net/proofs/artist/e6d5fc39-7871-41ac-bc65-4576e088c982.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sonata No. 1 in F Major, ZWV 181, 1: I. Adagio ma non troppo
Sonata No. 4 in F Major, ZWV 181, 4: I. Andante
Sonata No. 1 in F Major, ZWV 181, 1: II. Allegro
Sonata No. 4 in F Major, ZWV 181, 4: II. Allegro
Sonata No. 1 in F Major, ZWV 181, 1: III. Larghetto
Sonata No. 4 in F Major, ZWV 181, 4: III. Adagio
Sonata No. 1 in F Major, ZWV 181, 1: IV. Allegro assai
Sonata No. 4 in F Major, ZWV 181, 4: IV. Allegro ma non troppo
Sonata No. 2 in G Minor, ZWV 181, 2: I. Andante - Adagio
Sonata No. 5 in F Major, ZWV 181, 5: I. Allegro
Sonata No. 2 in G Minor, ZWV 181, 2: II. Allegro
Sonata No. 5 in F Major, ZWV 181, 5: II. Adagio
Sonata No. 2 in G Minor, ZWV 181, 2: III. Andante - Adagio
Sonata No. 5 in F Major, ZWV 181, 5: III. Allegro
Sonata No. 2 in G Minor, ZWV 181, 2: IV. Allegro
Sonata No. 6 in C Minor, ZWV 181, 6: I. Andante
Sonata No. 3 in B-Flat Major, ZWV 181, 3: I. Adagio
Sonata No. 6 in C Minor, ZWV 181, 6: II. Allegro
Sonata No. 3 in B-Flat Major, ZWV 181, 3: II. Allegro
Sonata No. 6 in C Minor, ZWV 181, 6: III. Adagio
Sonata No. 3 in B-Flat Major, ZWV 181, 3: III. Largo
Sonata No. 6 in C Minor, ZWV 181, 6: IV. Allegro
Sonata No. 3 in B-Flat Major, ZWV 181, 3: IV. Tempo giusto - Allegro
Sinfonia Concertante for Four Winds in E-Flat Major, K. 297b: I. Allegro
Horn Concerto No. 2 in E-Flat Major, K. 417: I. Allegro
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1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9279096c81e39c5cb45e66c60a5ad075eddfc758df55a4b082f8273ab445dd4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6DZBc6clhKaGTuQLAbLGgE.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6DZBc6clhKaGTuQLAbLGgE.
Sinfonia Concertante for Four Winds in E-Flat Major, K. 297b: II. Adagio
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e29f32dddc25039b8c9682ff298230c61cc518fa2e018a5e4483d2976d82f7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7aeHC7SgaJlskY6JEoTYBX.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7aeHC7SgaJlskY6JEoTYBX.
Horn Concerto No. 2 in E-Flat Major, K. 417: II. Andante
Sinfonia Concertante for Four Winds in E-Flat Major, K. 297b: III. Andantino con variazioni
Horn Concerto No. 2 in E-Flat Major, K. 417: III. Rondo. Allegro - Più allegro
Oboe Concerto in C Major, K. 314: I. Allegro aperto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c1abd28efa571fdac861b68fef65a1a1af1b64e349608f0b4c0a918d7d5ba4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2iZTq4JJD6Pdsi2ZEihunU.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2iZTq4JJD6Pdsi2ZEihunU.
Serenade No. 10 in B-Flat Major, K. 361, "Gran Partita": I. Largo - Molto allegro
Oboe Concerto in C Major, K. 314: II. Adagio non troppo
Serenade No. 10 in B-Flat Major, K. 361, "Gran Partita": II. Menuetto
Oboe Concerto in C Major, K. 314: III. Rondo. Allegretto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe262cdf38ee2692f3d12cc285b035ce44d7cbbd55f34e498ef10189a9c0a43b6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/64wcgwGrd16qVxPRh9gL0A.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/64wcgwGrd16qVxPRh9gL0A.
Serenade No. 10 in B-Flat Major, K. 361, "Gran Partita": III. Adagio
Clarinet Concerto in A Major, K. 622: I. Allegro
Serenade No. 10 in B-Flat Major, K. 361, "Gran Partita": IV. Menuetto. Allegretto
Clarinet Concerto in A Major, K. 622: II. Adagio
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7603accafef45394d15a8ee109c7b1bf6cbd5366e25e7d9dff3f74618624f084. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3GptTkLprVfa412PjRF4iJ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3GptTkLprVfa412PjRF4iJ.
Serenade No. 10 in B-Flat Major, K. 361, "Gran Partita": V. Romance. Adagio
Clarinet Concerto in A Major, K. 622: III. Rondo. Allegro
Serenade No. 10 in B-Flat Major, K. 361, "Gran Partita": VI. Tema con variazioni
Serenade No. 10 in B-Flat Major, K. 361, "Gran Partita": VII. Finale. Molto allegro
Sonata in B-Flat Major, K. 454: Largo - Allegro - Arr. for Oboe
Sonata in B-Flat Major, K. 454: Andante - Arr. for Oboe
Sonata in B-Flat Major, K. 454: Allegro - Arr. for Oboe
Sonata in E Minor, K. 304: Allegro - Arr. for Oboe
Sonata in E Minor, K. 304: Tempo di Menuetto - Arr. for Oboe
Sonata in B-Flat Major, K. 378: Allegro moderato - Arr. for Oboe
Sonata in B-Flat Major, K. 378: Andantino sostenuto. Cantabile - Arr. for Oboe
Sonata in B-Flat Major, K. 378: Rondeau - Arr. for Oboe
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c1abd28efa571fdac861b68fef65a1a1af1b64e349608f0b4c0a918d7d5ba4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6dmnjL7vgRtW43jB9pq6EE.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6dmnjL7vgRtW43jB9pq6EE.
{"copyright_id":"0x049e0209abeee7c689c7d43964a85f5e3132aa32112746008ebd7433ab2616c9","isrc":"GBDGQ2135402","name":"Oboe Concerto in C Major, K. 314: II. Adagio non troppo","registered_at":"2026-06-27T07:39:56Z","spotify_id":"0uHbRnOsqjfpAYgHYB8v9Q","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049e0209abeee7c689c7d43964a85f5e3132aa32112746008ebd7433ab2616c9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0uHbRnOsqjfpAYgHYB8v9Q.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0uHbRnOsqjfpAYgHYB8v9Q.
{"copyright_id":"0xe262cdf38ee2692f3d12cc285b035ce44d7cbbd55f34e498ef10189a9c0a43b6","isrc":"GBDGQ2135403","name":"Oboe Concerto in C Major, K. 314: III. Rondo. Allegretto","registered_at":"2026-06-27T07:38:58Z","spotify_id":"03BZAhlVzimueUnELyvxiQ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe262cdf38ee2692f3d12cc285b035ce44d7cbbd55f34e498ef10189a9c0a43b6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/03BZAhlVzimueUnELyvxiQ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/03BZAhlVzimueUnELyvxiQ.
Oboe Concerto in C Major, K. 314 (Final Cadenza by Tonia Ko): I. Allegro aperto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb15f23fae84267a77bd35ea7b6809bd31d16be8f230699a8e8819290fe8fb33. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/69yGpVbBDk3HHYIO4TPCRu.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/69yGpVbBDk3HHYIO4TPCRu.
Oboe Concerto in C Major, K. 314 (Final Cadenza by Tonia Ko): II. Adagio non troppo
Oboe Concerto in C Major, K. 314 (Final Cadenza by Tonia Ko): III. Rondo. Allegretto (Cadenza by Tonia Ko)
Sonata in B-Flat Major, K. 378: Rondeau (Arr. for Oboe)