Antonis Diamantidis (Greek: Αντώνης Διαμαντίδης), also known as Antonis Dalgas (Greek: Αντώνης Νταλγκάς) was a Greek musician. He was notable for his rebetiko songs. He was also a songwriter and best
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 0xec3ccedf04d170987064e8c9b9d54c01c356917ab4332bced1d824865d85d3a3. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9acb8cb8-d870-468d-8bf6-81cc6945d91f.json and https://artists.proofprofile.net/proofs/artist/9acb8cb8-d870-468d-8bf6-81cc6945d91f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tragouda Amanedes, Rembetika Kai Dimotika