The scientific production association ERGA (NPO ERGA) is a Russian manufacturer of magnetic systems and industrial equipment based on them. Production and the central office are located in Kaluga. The
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 0x18bbf8dfa142d3820859de558987535e8ec45edd7c9ea92ad9313c6c2bc411d0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd35a201-e8ef-464c-8e9b-41757c4a6fd3.json and https://artists.proofprofile.net/proofs/artist/cd35a201-e8ef-464c-8e9b-41757c4a6fd3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).