Kawayan (IPA: [kaʊ'aɪɐn]), officially the Municipality of Kawayan (; ; ), is a municipality in the province of Biliran, Philippines. According to the 2024 census, it has a population of 21,422 people
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 0xf070080db9148e9b55d519c1e67fa8a07aed4c84efa5a63aa9c1809826d4c146. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/434a4c1f-a234-4d32-8a79-12f263f90d07.json and https://artists.proofprofile.net/proofs/artist/434a4c1f-a234-4d32-8a79-12f263f90d07.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).