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 0x8a91759e5a343f0ec55a946d1f024b82810ae00addb6085575ba3265ecff4264. 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/f84311ff-4404-4927-a89b-29867dee2fc2.json and https://artists.proofprofile.net/proofs/artist/f84311ff-4404-4927-a89b-29867dee2fc2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Toter Winkel - Ein Jeannette Dürer Krimi [Jeannette Dürer ermittelt, Band 1 (Ungekürzt)]
Tiefe Schatten - Ein Jeannette Dürer Krimi [Jeannette Dürer ermittelt, Band 2 (Ungekürzt)]
Falsche Engel - Ein Jeanette Dürer Krimi [Jeannette Dürer ermittelt, Band 3 (Ungekürzt)]
Triste Töne - Ein Jeanette Dürer Krimi [Jeannette Dürer ermittelt, Band 4 (Ungekürzt)]
Kalte Herzen - Ein Jeannette Dürer Krimi [Jeannette Dürer ermittelt, Band 5 (Ungekürzt)]
Teurer Spaß - Ein Jeannette Dürer Krimi [Jeannette Dürer ermittelt, Band 6 (Ungekürzt)]
Kapitel 1 - Teurer Spaß - Ein Jeannette Dürer Krimi - Jeannette Dürer ermittelt, Band 6
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 0xab22c6920b7845aaa44acea43514736d5b24c9dd47eb795e0a276a2e5368b50a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEXO52412860.