Andrew Kabiru Karuku (born 8 January 1978), popularly known as Abbas Kubaff, is a Kenyan hip hop artist who was raised in the Kariobangi South, Nairobi. As a member of the rap group K-South, and later
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 0xd0892d863126e779a55a045e72d87f470dee81691d99d1bf07cbca31b990349a. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5ac4964-8d15-4438-a8fb-cd19ed6197da.json and https://artists.proofprofile.net/proofs/artist/c5ac4964-8d15-4438-a8fb-cd19ed6197da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).