Erdoğan Kaya (born 27 March 2001) is a Turkish professional footballer who plays for Kırklarelispor. Career Kaya made his professional debut with Beşiktaş in a 4-0 UEFA Europa League loss to Wolverha
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 0xd20eb64adb0f86e3086b606717dc4aead1a147bfd62caf58ec673319a90ae191. Chain 2 (Bitcoin): anchored in block 953867 (2026-06-16T01:09:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05257e12-e6f0-4944-85d1-836c379df3f3.json and https://artists.proofprofile.net/proofs/artist/05257e12-e6f0-4944-85d1-836c379df3f3.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.