Ансамбль Уральской Грусти им. П. П. Бажова
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 0x64c5d17a90e32e5d1f40133aec6a7c3f35080dc0b088ac7cec1bf1bb29580920. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0513a2b-b9e7-4549-8e4b-3fb7072de7f4.json and https://artists.proofprofile.net/proofs/artist/c0513a2b-b9e7-4549-8e4b-3fb7072de7f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).