Hakan is a common Turkish forename, based on the Turkish language variant of the imperial title Khagan. The name is also spelled Khakan or Khaqan in other parts of the world, with the same etymology.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2285f01d0fd69d0bb092608a55c79d23624a5e95986ee053a83cc426c9309f3d. 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/ffc1f255-295b-4016-87fb-02cb4d8b1429.json and https://artists.proofprofile.net/proofs/artist/ffc1f255-295b-4016-87fb-02cb4d8b1429.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).