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 0x2cd82989c1b2378c61acdf1d988a747511c00faeabb15e4bde28079daf9551bb. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9feaa25d-fd66-4c52-a379-d4a1097fb61f.json and https://artists.proofprofile.net/proofs/artist/9feaa25d-fd66-4c52-a379-d4a1097fb61f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Brockes-Passion: 18. Aria à 4. "So wachet doch, erwachet doch" (Jesus, Petrus, Jacobus, Johannes)
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 0xd45bd879ff481ed0eb0339d5177d0894531ffd9c8ec997cdd8222f5b5ad16736. 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/DEY321303018.
The Brockes-Passion: 37. Aria. "Erweg, ergrimmte Natternbrut" (Basso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e702f8eb8c968327d90af5432241f463b9c403a71f9c9b13920461faf5479ae. 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/DEY321303037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e170779650f8403584f7ca3c00dc3f8e4d9b47d1398856538431df96c71d49c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR50X1741202.
De vez en cuando la vida: Joan Manuel Serrat y el siglo de oro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e170779650f8403584f7ca3c00dc3f8e4d9b47d1398856538431df96c71d49c. 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/FR50X1741202.