Vandar (, also Romanized as Vanehdar, Vendar, and Winadar; also known as Vamdar Koohpayeh) is a village in Kuhpayeh-e Sharqi Rural District, in the Central District of Abyek County, Qazvin Province, I
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 0x5484aa458c3d2d9d27ce877ef28b15dd0ac868d72a7d0aa8f7ffb01b35b16b0a. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ee560f9-3dcd-4bab-abdc-05c5e13b505d.json and https://artists.proofprofile.net/proofs/artist/2ee560f9-3dcd-4bab-abdc-05c5e13b505d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).