Artur Ruciński (born 1976) is a Polish operatic baritone singer. Biography Ruciński studied at the Warsaw Academy of Music and made his debut as Papageno in The Magic Flute with Warsaw Chamber Oper
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 0x2d3edb8b5bd89f5fb59e8c9a9b29ad05dc967c38b19c05078d9145760bffa429. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdb5928b-cc17-4c99-b54a-6f21ebf88339.json and https://artists.proofprofile.net/proofs/artist/cdb5928b-cc17-4c99-b54a-6f21ebf88339.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).