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 0x911f39f1991f3e987c982013f77f70f34daf49fbe0113c2c63e7ca7af19fd2b9. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f9e1721-e2a8-45fd-b98e-66eadc60c8f3.json and https://artists.proofprofile.net/proofs/artist/6f9e1721-e2a8-45fd-b98e-66eadc60c8f3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Von Mensch und Welt (Musik von Antoine Forqueray and Peter Uehling)
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 0x79af5bca5af7f78670adf2b71b7415b1a235b1b89a317bc4901611491fa00c10. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961731323.
Schütz: Matthäus-Passion (Complete Recording Vol. 11)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb911e0b2b57b57afdf8be4cbd91d3bfc8066354c357e2e1dab527675e10b03bc. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEB111500101.
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
Kleine geistliche Konzerte I, Op. 8: No. 14, Fürchte Dich nicht, ich bin mit dir, SWV 296
Schütz: Kleine geistliche Konzerte I, Op. 8 (Complete Recording Vol. 7)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe8ae0becd4d2482b400c311a9e6a43240ff255b12acbb049e2ed6e5a369855. 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/DEB111301514.
Nun preiset alle Gottes Barmherzigkeit, BWV 391
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e69346420a4efdc4ff4ac4c336ce949802383f06f332b050882c27810918589. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEN961731312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce160158a7a1423ea53cdf27f58c774c6e42ac38396d257715a966b7c2e8441. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961731330.
Uns ist ein Kindlein heut geborn, BWV 414
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1b24fc485f1cf2c6114743b5a74b9887eaab1e61245662839a5969074ea6bd. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/DEN961731336.