Sardo is a hard, grating cow's milk Argentine cheese that is similar to pecorino romano, although the latter is made from sheep's milk and is sharper. Sardo comes from Argentina, and is not to be conf
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 0xe133cede860d830d10016cee040b9ca8d2d553abc1e0d35abc93659857a3068e. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbaf9b5a-f7d8-464c-aaf4-510166b1e0ca.json and https://artists.proofprofile.net/proofs/artist/bbaf9b5a-f7d8-464c-aaf4-510166b1e0ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).