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 0xa425f4384b30bdb0b3afb23c5b591b20d00825cf6253c6928914025b98c0a021. 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/a0935271-26bd-4d29-9fc3-5bf8e47dae58.json and https://artists.proofprofile.net/proofs/artist/a0935271-26bd-4d29-9fc3-5bf8e47dae58.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Flute Sonata in E Major, BWV 1035: III. Siciliano
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 0x535a5e512c90f812dd146f4e310778fa11e165260eb674b7dc49422d5b4b95d1. 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/QM4TX1557566.
Flute Sonata in E Major, BWV 1035: IV. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524f8dd4311482b79f4bfc5fe7a8ae9e3b6cd1db8b694736dc3aaf11f9d4c80c. 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/QM4TX1557567.
Trio Sonata for Flute, Oboe and Continuo in E Minor, TWV 42e2: I. Affettuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef551ad0ce2447a5094ab8b646e7784fa70046788c174c7e443ad1c6c28ecc7. 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/QM4TX1557568.
Paris Quartet No. 2, TWV 43D1: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7e314115ed94ca1a5f8823b8d10ae76ef7818a578c3e398948c58c4b4e6fd9. 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/QM4TX1557572.
Serenade in D Major, Op. 25: I. Entrata - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678871abcd4d0b3ea8d10e8881c9ee2bfe6d5b36e98880ac180fc2cfa842b1e9. 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/QM4TX1557575.
Serenade in D Major, Op. 25: IV. Andante con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a14ef49bbbbb13be896712be01401f0adc15ceeb756830a64af0090c3a0c5d9. 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/QM4TX1557578.
Flute Sonata in E Major, BWV 1035: I. Adagio ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8085b9951be2d34c9258a18c83f1ff67ad3a4860d0eacefefec62db4821aa7. 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/QM4TX1557564.
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
Flute Sonata in E Major, BWV 1035: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3355f989717f39e7f3eb4cd5131b701bd2194770e1ff629e59cadbc006d4777c. 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/QM4TX1557565.
Trio Sonata for Flute, Oboe and Continuo in E Minor, TWV 42e2: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b5f3c58cb8f837b8f9c87f02c7b45d7c5e73dfebe8829ab33b957c4505df14. 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/QM4TX1557569.
Trio Sonata for Flute, Oboe and Continuo in E Minor, TWV 42e2: III. Dolce
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c7c49f657de2eb676d9714171fcbeb5419c2ba420a101a3c260a38df2808cd. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM4TX1557570.
Paris Quartet No. 2, TWV 43D1: II. Affettuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c9acc13838b6e1b041645f79f31bbbca1a3783716cadbe04df3454d8235991. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QM4TX1557573.
Paris Quartet No. 2, TWV 43D1: III. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7678952a4fa16bb7e67c1cc1dfd932815178dc28c7286d2a50809d28188cbc3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM4TX1557574.
Serenade in D Major, Op. 25: II. Tempo ordinario d'un menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb619db893fbd7334a159e3fb2b2e2d5ee6ea7e5351312f667ca82ab423be2299. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM4TX1557576.
Serenade in D Major, Op. 25: VI. Adagio – Allegro vivace e disinvolto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac81c38efe9eef92e50a876b7402290513876f4c94c0e30b0d6479266df8ca2a. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QM4TX1557580.
Sinfonia for 2 Oboes in G Major (Arr. A. Camden): I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0eb2053ef4fb264d56a7bdbdf4a957d49b96d9d03bf65819fd06eb3d289951. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKI199202801.
Sinfonia for 2 Oboes in G Major (Arr. A. Camden): II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96e4bf8c045190d88a01bb0ddcb84fd7ae36539b8443d7d72217817acd91f7a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199202802.
Sinfonia for 2 Oboes in G Major (Arr. A. Camden): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0d311424302892aefbc9915351c76bbe8c89f9e40abdd3747d4ca949213f07. 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/HKI199202803.
Concerto for 2 Oboes in C Major, Op. 7 No. 2: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7be02901061ac2a5ec5ead5b8e0c1f610fd81e2e6178d66aa2b66a2ad4dcc97. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/HKI199202804.
Concerto for 2 Oboes in C Major, Op. 7 No. 2: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e34852641000bd1ad3d4fb1b37032a9a43584c8335ff368213145c8b2e91b0. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/HKI199202806.
Oboe Concerto in B-Flat Major, Op. 7 No. 3: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99735712fba4f20454edb430710402a3824336d32ba47cb32dfb24944b05b57a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/HKI199202808.
Oboe Concerto in B-Flat Major, Op. 7 No. 3: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63ebd154d607b30525f0080c021da3b827e8cc21dc457c5151dd116b76cede0. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/HKI199202809.
Concerto for 2 Oboes in D Major, Op. 7 No. 8: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d682fa348fe80c498c01db8bb494d7be3a914fa774d98e5e42a224c8e821d7. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/HKI199202810.
Oboe Concerto in F Major, Op. 7 No. 9: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5247cfe9f6d7ba51f724d4fbebf415b573e6189ce523ea26ae4a2e2f160f7aaf. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/HKI199202813.
Concerto for Orchestra in D Major, Op. 7 No. 1: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3343c872847d7d4e5473addca37701b67709e3fe3c7fab415a1acac813085585. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/HKI199202816.
Albinoni: Concertos pour hautbois, Vol. 1
Oboe Concerto in F Major, Op. 7, No. 9: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1a407a8d024a7bf4003c136ca5259ed885b13618cf8680e0d1870abedc3645. 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/HKI199202814.