Robert Kulek is an American classical pianist. He is of Latvian ancestry and currently resides in the Netherlands. He has recorded for multiple labels including EMI and Pentatone, and his recording of
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 0xb44d5e7076a7bc681040da043ed8f55e075e77de7a9eff98aedd54ce5eafba1c. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5891538-ac67-427a-a0a5-715551ccd5f2.json and https://artists.proofprofile.net/proofs/artist/b5891538-ac67-427a-a0a5-715551ccd5f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).