Fash () is a village in, and the capital of, Fash Rural District of the Central District of Kangavar County, Kermanshah province, Iran. Demographics Population At the time of the 2006 national census
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 0x9347ae74cab6e69deecc6e319bc79eaf05b361c181e3ec4116c3bad5323c22ca. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/154f61e5-38a5-4bfa-b0aa-ca512ab821ef.json and https://artists.proofprofile.net/proofs/artist/154f61e5-38a5-4bfa-b0aa-ca512ab821ef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).