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 0xb699c5b791c6ad9cfc2b07ea7af357c2218131f3840f66ce71a385f2c60a7d27. 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/70f946b6-d321-4175-9f9f-cf8a97d64c8f.json and https://artists.proofprofile.net/proofs/artist/70f946b6-d321-4175-9f9f-cf8a97d64c8f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Trio Sonata in E Minor, TWV 42:e5: I. Andante
Trio Sonata in E Minor, TWV 42:e5: II. Vivace
Trio Sonata in E Minor, TWV 42:e5: III. Grave
Trio Sonata in E Minor, TWV 42:e5: IV. Vivace
Trio in D Major, Op. 9, No. 2: I. Allegro
Trio in D Major, Op. 9, No. 2: II. Romance: Larghetto
Trio in D Major, Op. 9, No. 2: III. Rondo: Allegretto
Trio Sonata in C Minor, HWV 386a: I. Largo
Trio Sonata in C Minor, HWV 386a: II. Allegro ma non troppo
Trio Sonata in C Minor, HWV 386a: III. Andante
Trio Sonata in C Minor, HWV 386a: IV. Allegro
Trio in D Major, Op. 9, No. 3: I. Allegro
Trio in D Major, Op. 9, No. 3: II. Andante
Trio in D Major, Op. 9, No. 3: III. Rondo
Trio Sonata in A Minor, TWV 42:a1: I. Affettuoso
Trio Sonata in A Minor, TWV 42:a1: II. Vivace
Trio Sonata in A Minor, TWV 42:a1: III. Grave
Trio Sonata in A Minor, TWV 42:a1: IV. Menuet and Trio
{"copyright_id":"0xb4b2f75a4f2d586cf3cb834c1723e8560f24d91002286ccd728ccb7d26a85183","isrc":"HKI199323105","name":"Trio Sonata in E Minor: I. Grave","registered_at":"2026-06-09T06:41:41Z","spotify_id":"3pKqKRpfK7NHzy0MGfOXGH","type":"track"}
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 0xb4b2f75a4f2d586cf3cb834c1723e8560f24d91002286ccd728ccb7d26a85183. 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/3pKqKRpfK7NHzy0MGfOXGH.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/3pKqKRpfK7NHzy0MGfOXGH.
{"copyright_id":"0x8fa4f5b9d594c97d9b37958ca1f91a42271e736ccc243b9ca96578b4a237a4da","isrc":"HKI199323107","name":"Trio Sonata in E Minor: III. Adagio","registered_at":"2026-06-24T09:59:08Z","spotify_id":"5bmuPpPtjjNgKRvbpgp88K","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa4f5b9d594c97d9b37958ca1f91a42271e736ccc243b9ca96578b4a237a4da. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5bmuPpPtjjNgKRvbpgp88K.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/5bmuPpPtjjNgKRvbpgp88K.
Sonata da camera a 3 in D Minor, Op. 2, No. 2: I. Allemanda: Adagio
Sonata da camera a 3 in D Minor, Op. 2, No. 2: II. Corrente: Allegro
Sonata da camera a 3 in D Minor, Op. 2, No. 2: III. Giga: Allegro
{"copyright_id":"0x4007801cf8c9655b3510cb35fd19b53acf287563cb1bcbd001eae39252d341c7","isrc":"HKI199323119","name":"Trio: II. Andante cantabile","registered_at":"2026-06-20T22:43:45Z","spotify_id":"418ALSUUK7dx7bIRLrHPXp","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4007801cf8c9655b3510cb35fd19b53acf287563cb1bcbd001eae39252d341c7. 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/418ALSUUK7dx7bIRLrHPXp.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/418ALSUUK7dx7bIRLrHPXp.