Giwar Hajabi (, ; 24 December 1981 – 7 May 2025), better known by his stage name Xatar, was an Iranian Kurdish-German rapper and businessman. He was the founder and owner of the labels Alles oder Nix
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 0x32eabe80ddd579ce8b96fc468418bd0d30db42cd6c2f6955f842987d72c46b5a. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6ea7ea4-51e3-4ad7-bf39-41eb947c4f20.json and https://artists.proofprofile.net/proofs/artist/b6ea7ea4-51e3-4ad7-bf39-41eb947c4f20.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).