Czarny () is a surname or a byname of Polish language origin. The nickname literally may mean "black", "dirty", "ugly", etc. Feminine forms: Czarna, Czarnina (historical, after husband), Czarnianka (h
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 0x9841a73508fd8dc0f83e513ab174a083b7a5e0cf24d885a75a6b19da2e6cc052. Chain 2 (Bitcoin): anchored in block 953922 (2026-06-16T09:36:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bfbd835-ed86-4a06-ad17-34525a2a8979.json and https://artists.proofprofile.net/proofs/artist/1bfbd835-ed86-4a06-ad17-34525a2a8979.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).