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 0x9eea782dcf1aab547ebf53de6fd0643cc6c6f055932f1916a774dd13aeeda5a7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66dc9e33-3470-4555-919a-cf713115bab2.json and https://artists.proofprofile.net/proofs/artist/66dc9e33-3470-4555-919a-cf713115bab2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vanilletage - Die Frauen der Backmanufaktur [Die Backdynastie, Band 1 (Ungekürzt)]
Zuckerjahre - Die Frauen der Backmanufaktur [Die Backdynastie, Band 2 (Ungekürzt)]
Zimtträume - Die Frauen der Backmanufaktur [Die Backdynastie, Band 3 (Ungekürzt)]
Die Queen: Elizabeth II. - Als Königin regierte sie ein Land, als Ehefrau und Mutter kämpfte sie um Erfüllung [Die Queen, Band 2 (Ungekürzt)]
Die Queen: Elizabeth II. - Als junge Frau wurde sie zur Königin, als Königin wurde sie zur Legende [Die Queen, Band 1 (Ungekürzt)]
Die Queen: Elizabeth II. - Als Monarchin führte sie ihr Volk in eine neue Zeit und brachte Beständigkeit im Wandel - Romanbiografie [Die Queen, Band 3 (Ungekürzt)]
Der Schmuckpalast - Antoinette und das Funkeln der Edelsteine [Die Juwelier-Saga, Band 1 (Ungekürzt)]
Kapitel 1 - Der Schmuckpalast - Antoinette und das Funkeln der Edelsteine - Die Juwelier-Saga, 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c04b672a1288f4c4275e071acabb66285135184b7c1b7d32d6ad6b9c329ff98. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:37:04Z), 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/DEXO42470704.
Der Schmuckpalast - Camille und der Glanz von Gold [Die Juwelier-Saga, Band 2 (Ungekürzt)]
Kapitel 1 - Der Schmuckpalast - Camille und der Glanz von Gold - Die Juwelier-Saga, Band 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781a2ef1a5b786ca9305a061c239772688ee7b907c7997db3367f20734f01fd0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEUE22560946.