Kareem Dennis (; born 23 May 1986), better known by his stage name Lowkey, is a British-Iraqi rapper and activist from London. He first became known through a series of mixtapes he released before he
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 0x5664c45b90c266a932aa2865bb122fd132f7494a068e993d83421f13b85b2e99. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd9eb40c-a8d6-493b-a05b-617cb1dee907.json and https://artists.proofprofile.net/proofs/artist/cd9eb40c-a8d6-493b-a05b-617cb1dee907.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).