Lechaim (Лехаим) is the flagship magazine of the Federation of Jewish Communities of the CIS (FJC). History and profile Lechaim was founded in 1991. It is printed monthly in Russian, with sections on
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 0x15912a83a9c0353a36ea2c2faaf619084f5d52861ac287aa31ea370b29225036. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5db87dbe-352d-4dcc-b881-f93718d49390.json and https://artists.proofprofile.net/proofs/artist/5db87dbe-352d-4dcc-b881-f93718d49390.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).