Hüseyin Kalkan () is the former mayor of Batman in Southeast Anatolia, Turkey, and a member of the Democratic Society Party (DTP). He gained international notoriety November 2008 after he announced p
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 0x87675c1c2fabd6db5a98a7facb3b2cbb551075841d08793efc2ac55f0aa2db6c. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a85c083-357d-433b-961c-31a91e49269a.json and https://artists.proofprofile.net/proofs/artist/6a85c083-357d-433b-961c-31a91e49269a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).