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 0x85b9f3100ee25a6ecefe091281049fb17afe439d876f99d2d34d52164aa42241. Chain 2 (Bitcoin): anchored in block 953933 (2026-06-16T11:13:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ffc3fa5-08ed-4213-b574-8ee9ab0ade32.json and https://artists.proofprofile.net/proofs/artist/1ffc3fa5-08ed-4213-b574-8ee9ab0ade32.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Köthener Trauermusik, BWV 244a: No. 12 Aria « Mit Freuden sei die Welt verlassen » - Arr. for Saxophone, Guitar, Drums & Viola by Hugo Afettouche
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 0x239ffb569605b566821b555546d7f11284bff46e565283e26f44de1fd47c5891. 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/FR9KX2300060.
Cello Suite No. 4 in E-Flat Major, BWV 1010: Gigue - Arr. for Saxophone by Matthieu Delage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce649e0e77c77e375ea7d4825a9041341c094b219d84b8c74668c2d57a55f8aa. 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/FR9KX2300130.
Goldberg Variations, BWV 988: Aria - Arr. for Saxophone by Matthieu Delage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4999371ad1eb8343f7d77fb287b028bf51569e638a15349dca8b107556e30208. 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/FR9KX2300170.
The Well-Tempered Clavier Book I, BWV 855: Prelude No. 10 in E Minor - Arr. for Saxophone & Guitar by Matthieu Delage & Benjamin Garson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a07e53b859c66bec95e3a3a0dc119ba5acc97935a59b72434e5069d82e94f7. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/FR9KX2300070.
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
Cello Suite No. 4 in E-Flat Major, BWV 1010: Prélude - Arr. for Saxophone by Matthieu Delage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f68d7a2afe1a5ab77009ebef45ea0cced977ce746ad41ac49ee77f699f4c72e. 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/FR9KX2300080.
Cello Suite No. 4 in E-Flat Major, BWV 1010: Allemande - Arr. for Saxophone by Matthieu Delage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4c796ab61a90c02f7e3a46c6681519a06451832caf109715a64a90b627468d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9KX2300090.
Cello Suite No. 4 in E-Flat Major, BWV 1010: Courante - Arr. for Saxophone by Matthieu Delage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f442b3e20b8994352614c64da34f4e11e5d589ee743167d3731bc7e1d5e9600. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9KX2300100.
The Well-Tempered Clavier Book I, BWV 847: Prelude No. 2 in C Minor - Arr. for Saxophone & Guitar by Matthieu Delage & Benjamin Garson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e92cc7d56f125b6f8c7f052be0e0d63535976c56339f1a49ca54366cfdddd6a. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/FR9KX2300160.
Goldberg Variations, BWV 988: Variation 5 - Arr. for Saxophone by Matthieu Delage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2172e86c91d709c3ce36ca10828157e32aacea977c4a74d95a69d36013a6aa. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9KX2300180.