Barbarossa, a name meaning "red beard" in Italian, primarily refers to: Frederick Barbarossa (1122–1190), Holy Roman Emperor Hayreddin Barbarossa (c. 1478–1546), Ottoman admiral Operation Barbaros
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 0xf09dccb5a464b8607959f72afa7d430f9c86a61534cbc3a28244d628af413c00. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89663925-a219-4cbe-b152-82cd2705aa46.json and https://artists.proofprofile.net/proofs/artist/89663925-a219-4cbe-b152-82cd2705aa46.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).