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 0x35c61db664a55437ebfd052710f25b3d1b0fe560e7cc96e5385847c70965d9b5. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/151f60ef-d793-43b2-8e07-f2d1020cc7fc.json and https://artists.proofprofile.net/proofs/artist/151f60ef-d793-43b2-8e07-f2d1020cc7fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Matthäus-Passion, BWV 244, Prima parte: Nr.7. Da ging hin der Zwölfen einer (Evangelista, Judas)
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 0x46711e5a3cf7140e7f035f83fcce63a3684eb8e0094ceb7a031bce69592a8ab9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2133070.
Matthäus-Passion, BWV 244, Prima parte: Nr.11. Er antwortete und sprach (Evangelista, Jesus, Judas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c14675de393bc963643b6d2a687d0af25d5a474e968da3760e361821cc3c376. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR7JM2133110.
Matthäus-Passion, BWV 244, Prima parte: Nr.26. Und er kam und fand sie aber schlafend (Evangelista, Jesus, Judas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f78aa402aae06a9a9aa5835ae920d03da8f21dd61f68c441479a0aab76272d7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2133260.
Matthäus-Passion, BWV 244, Seconda parte: Nr.41. Des Morgens aber hielten alle Hohenpriester (Evangelista, Judas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3873ef9e7083ef12840767ed274fc7274b2021e0ae776bcd078ff8b0045c3a1d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR7JM2134120.