Adnan Hamidović (born 31 May 1982), known professionally as Frenkie, is a Bosnian rapper, songwriter, author, and graffiti artist. One of the most prominent figures in Balkan hip-hop, he is recognized
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 0xcc9cacecb139117f05477178bc83c0887979cf0993130721ef82752200d9b731. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/136fffd0-b389-4134-a2b4-9e99e0191956.json and https://artists.proofprofile.net/proofs/artist/136fffd0-b389-4134-a2b4-9e99e0191956.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).