Mustafa Demir (18 January 1961 – 6 August 2025) was a Turkish architect and politician who was the Mayor of the Samsun Metropolitan Municipality. Prior to his becoming mayor, he was the Samsun Deputy
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 0xe14b39fdeb3f23e04f1290682db05a5c764b1023e48670a861cb941dcce31d9b. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fff9e230-1e31-4e0b-b44e-8f63b116e4e6.json and https://artists.proofprofile.net/proofs/artist/fff9e230-1e31-4e0b-b44e-8f63b116e4e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).