Cortese is a white Italian wine grape variety predominantly grown in the southeastern regions of Piedmont in the provinces of Alessandria and Asti. It is the primary grape of the Denominazione di orig
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 0x576efa14e132913d00dc1bc439da633cc0ecce4091a8a9326aa1e18112b69838. Chain 2 (Bitcoin): anchored in block 954097 (2026-06-17T13:13:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b704d13-c490-4135-8073-65a21f2689fd.json and https://artists.proofprofile.net/proofs/artist/7b704d13-c490-4135-8073-65a21f2689fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).