Irka (, also Romanized as Īrkā) is a village in Mianrud Rural District, Chamestan District, Nur County, Mazandaran Province, Iran. At the 2006 census, its population was 220, in 58 families. Referen
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 0xe46d693fb5c16a32905eac9e45c5bafa1a8650a886978227af6083266cc9e957. Chain 2 (Bitcoin): anchored in block 954025 (2026-06-17T00:32:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38f5f60d-11df-4797-830d-c72cb419bdaa.json and https://artists.proofprofile.net/proofs/artist/38f5f60d-11df-4797-830d-c72cb419bdaa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).