Ryba (Czech and Slovak feminine: Rybová) is a Czech, Polish and Slovak surname, meaning 'fish'. Notable people with the surname include: Hieronim Ryba (1850–1927), Polish friar, priest and church bui
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 0xb7370abf73e54e81c84a4796aed4504969c1f83daf69a936e6ea61951ac8e3bc. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffdb2a2f-7906-4355-a5c3-39089c384b78.json and https://artists.proofprofile.net/proofs/artist/ffdb2a2f-7906-4355-a5c3-39089c384b78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).