Kostas Hatzis (also Chatzis or Khadzis; , ; born 13 August 1936) is a Greco-Romani singer-songwriter. Hatzis was born in the city of Livadeia to a Romani family. Considered a leading composer and a p
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 0xdaddc57cb44ec50c2dceeba2e94e6c40d894d24304d6cd3d7baad450cde55f10. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8f4b333-cb66-4a07-afa6-ac08a7ead039.json and https://artists.proofprofile.net/proofs/artist/b8f4b333-cb66-4a07-afa6-ac08a7ead039.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).