Limun (, also Romanized as Līmūn) is a village in Mazkureh Rural District, in the Central District of Sari County, Mazandaran Province, Iran. At the 2016 census, its population was 365, in 117 familie
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 0xaf9372b7cf5591dae05800e78a5836c4f075c05901b8e05ae1f0229bf1f9e794. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7dd157ce-66ec-4091-9977-5a9b584cb239.json and https://artists.proofprofile.net/proofs/artist/7dd157ce-66ec-4091-9977-5a9b584cb239.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).