thumb|245px|Christian Cannabich - copper engraving by Egid Verhelst 1779 Johann Christian Innocenz Bonaventura Cannabich (baptised 28 December 1731 – 20 January 1798), was a German violinist, compose
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 0xc3a3c4b263d3346619800b63e2a2be14cb6f5170b9a2f878aca052405bde7d56. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fb1f1c6-9695-4048-be0f-053f9ce4341f.json and https://artists.proofprofile.net/proofs/artist/3fb1f1c6-9695-4048-be0f-053f9ce4341f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Der Kaufmann von Smyrna: Ouverture in F Major
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 0x830f174ede5b06c885eb637bf1873e87bcbb1940f6939ae17e72124e99ba8f13. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962201760 — a six-check JSON result.
Symphony No. 55 in C Major: I. Allegro maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e70dfc9d5fc7e6465299109f99dbafac731deda828d0f68e31895573232fc67. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962201771 — a six-check JSON result.
Symphony No. 55 in C Major: II. Andante non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42815b07ce3e5938d25e23e49db3d4fff7823178d69ff8f8e9fe2d54c9291f91. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962201772 — a six-check JSON result.
Symphony No. 55 in C Major: III. Presto ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1e2e9b75a1bdf49bb109da23e47ed8a495b73cd3c4330e85e5804f988e81dc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962201773 — a six-check JSON result.
Violin Concerto in F Major: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee540d83aaa087c3e7ead1d2682f851aab4a5614cacafd4270bfd54ca0a6a18b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962201781 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3888a8ee785f256b142dcc7597fe5ee45d8658e58ac1c6bac47a5a8edda701. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962201782 — a six-check JSON result.
Violin Concerto in F Major: III. Rondeau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4fd170a788262646e60b7b0006d1587d9194d344aa9a9ba6befe6caa41bc23. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962201783 — a six-check JSON result.
Sextet in B-Flat Major: I. Andante grazioso. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc5213bdb0a2adc50de2f66ac1732efd0874802c01cb6976389eb42a749ff5a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962201790 — a six-check JSON result.
Günther von Schwarzburg: Sinfonia in E-Flat Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17937609a24107a62e874d1869b3172d1c17e6608a8269297907ada7c84b66ec. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962201800 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f0f518f028a8fd49dac331ee7e51a1903c83a23dfe47dfcae0142d3af2fd8a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962201812 — a six-check JSON result.
Symphony in C Major, K. 102: I. Molto allegro (After Overture to Il re pastore, K. 208)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f2e700dd53bd938b9584b024c3bd39af12129a1ea60f23ba29ffc94771e452. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962201821 — a six-check JSON result.
Symphony in C Major, K. 102: III. Presto assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428fdfe8ad1c062fce3b7ea4d4a75366bc9cebfae0149356d03d1bca9fcf40b4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962201823 — a six-check JSON result.
Cannabich: Flute Quintets Op. 7 Nos. 3-6
Richter / Stamitz / Filtz / Cannabich: Concertos of the Mannheim School
Toeschi, C.J.: Symphony in D Major / Danzi, F.: Piano Concerto in E-Flat Major / Wendling, J.B.: Flute Concerto, Op. 4
Symphony No. 49 in F Major, Op. 10, No. 4: I. Allegro spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370349ff98110571837849c7a8620156e52b67ca285cf3d2ea0d7f268cf5f756. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831601 — a six-check JSON result.
Symphony No. 49 in F Major, Op. 10, No. 4: III. Presto ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96528a29b59da25c51aca80fd3e39b535a549442c2c82e7836159785649d0cba. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831603 — a six-check JSON result.
Symphony No. 50 in D Minor, Op. 10, No. 5: Symphony No. 50 in D Minor: I. Allegro non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed4ebd72bec2a68f3ff645f0e09bf2afa83a020b02762b7db497436875f6b4f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831604 — a six-check JSON result.
Symphony No. 50 in D Minor, Op. 10, No. 5: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbbfd30b092727d5f9a52bb11244f6e19b9376fe6641d4edb6501309dadc97f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831606 — a six-check JSON result.
Symphony No. 51 in D Major, Op. 10 No. 1: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52817176749c5f9300522c0e91fe0502e7ff91ed87b767cddcd10ea6f35ed3bd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831613 — a six-check JSON result.
Symphony No. 51 in D Major, Op. 10 No. 1: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfebb06d153e0a873089d4f0002e3d732c8aa05c87a25cb95e1ead2341d60454. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831614 — a six-check JSON result.
Cannabich: Symphonies Nos. 59, 63, 64, 67 and 68
Discovering the Classical String Trio, Vol. 1
Symphony In F Major, Op. 4, No. 1: Allegro Molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b863fd6c4162b95a411c2231a8f68391516d8de7d6c01d272ebfa14f48766c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199619501 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8262ba15e4447a9c26b4c2e7a1d13911a3e969d5b01148bc051d7b3dd13f1737. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA4Q32300716 — a six-check JSON result.
Cannabich, C.: Fetes Du Serailles (Les) / Mozart, W.A.: Zaide (Excerpts)
World of the 18Th Century Symphony (The)
Minuetto - 1999 Chamber Music Festival Highlights
Symphony No. 49 in F Major: I. Allegro spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370349ff98110571837849c7a8620156e52b67ca285cf3d2ea0d7f268cf5f756. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831601 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10d059b13b326d9bf15fdf56bfbc51dd460140a0c5230b4db18e4463247113a. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831602 — a six-check JSON result.
Symphony No. 49 in F Major: III. Presto ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96528a29b59da25c51aca80fd3e39b535a549442c2c82e7836159785649d0cba. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831603 — a six-check JSON result.
Symphony No. 50 in D Minor, Op. 10, No. 5: I. Allegro non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed4ebd72bec2a68f3ff645f0e09bf2afa83a020b02762b7db497436875f6b4f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831604 — a six-check JSON result.
Symphony No. 50 in D Minor, Op. 10, No. 5: II. Andante con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f7ae1b4e384b3b7cef91026be988884357368e07c962248ad10375a5089de8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831605 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbbfd30b092727d5f9a52bb11244f6e19b9376fe6641d4edb6501309dadc97f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831606 — a six-check JSON result.
Symphony No. 48 in B-Flat Major: I. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e28eba8a43c898200c11bdba683bbba296affe2c1cdebf02b240fd1812b1ab. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831607 — a six-check JSON result.
Symphony No. 48 in B-Flat Major: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4c83de4fae8e27e60ee85d81763336902cff0e26d7e1cf33d9950206d44198. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831608 — a six-check JSON result.
Symphony No. 48 in B-Flat Major: III. Tempo di Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0591cf0356891a24f46d358d040aa32eb6dcb709be6741f9d475db3d84f3160. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831609 — a six-check JSON result.
Symphony No. 47 in G Major: I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd998e8e0242fb0e6be907e14850a48c6e888c34e0e5ae8e757a069db778497c3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831610 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2abcc967f65ddf63f1505a57f5fe114fe50eccc40f1dccac831fb06a9c8512. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831611 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e25a6dbaa971c5b1eafa80b1252c979768ccd08174ad3c55c179a4d35a35e67. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831612 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52817176749c5f9300522c0e91fe0502e7ff91ed87b767cddcd10ea6f35ed3bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831613 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfebb06d153e0a873089d4f0002e3d732c8aa05c87a25cb95e1ead2341d60454. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199831614 — a six-check JSON result.