Koya may refer to: Places Iraq Koya; (), a town in Iraqi Kurdistan Koya University, a university in that town Japan Mount Kōya, a mountain in Japan Kōya, Wakayama, a town on the top of Mount Kōy
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 0x4a743d41a5a287a4461ecf8fadc45b1e2b5e1ff3d32bb188d485189c11e39fba. 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/e9824b24-f606-4758-8339-d971c2bb037b.json and https://artists.proofprofile.net/proofs/artist/e9824b24-f606-4758-8339-d971c2bb037b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).