Stefan Milenkovich (; born 25 January 1977) is a Serbian violinist. Early life Milenković was born to a Serbian father, Zoran Milenković, and a Serbian-born mother of Italian descent, Lidija Kajnaco
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 0x084eeb2afd30697ceeb7487c774b9add65959ec65cb0253db8f721cb948483e8. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2249a93-673e-4df9-afbe-a5584c97d890.json and https://artists.proofprofile.net/proofs/artist/b2249a93-673e-4df9-afbe-a5584c97d890.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).