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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc208456be6f9a25cd39acaf389178b3c86e38f6517811195b57b6d27eaccb797. 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/1ab55d75-8d95-4803-be4e-3c4190764534.json and https://artists.proofprofile.net/proofs/artist/1ab55d75-8d95-4803-be4e-3c4190764534.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Das Mädchen mit der goldenen Schere [Starke Frauen erobern die Freiheit, Band 3 (ungekürzt)]
Die Löwin von Mogador [Mutige Frauen und fremde Kulturen, Band 3 (ungekürzt)]
Die Seidenrose [Starke Frauen erobern die Freiheit, Band 2 (ungekürzt)]
Denn die Hoffnung endet nie [Schicksalhafte Zeiten, Band 1, Im Sturmwind der Freiheit (ungekürzt)]
Kapitel 1 - Denn die Hoffnung endet nie - Schicksalhafte Zeiten - Im Sturmwind der Freiheit, Band 1
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bdceb5d14fddf07be1f840e7cdbc057491f793ab1889a2b0705dd0246cb03c. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/DEUE12579160.