300px|thumb|Krzysztof Baranowski Krzysztof Baranowski (born 26 June 1938, in Lwów) – yachtsman, sailing captain, journalist, teacher, member of the Council Board of Polish Maritime Foundation. He is t
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 0x1a148ed52356b52c94859e0b6cf6e4d488ce7596c0692fab6af8dd8a41177a72. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c1b9630-fd96-4624-b543-edff608be0c3.json and https://artists.proofprofile.net/proofs/artist/8c1b9630-fd96-4624-b543-edff608be0c3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).