Kang Young-hyun (; born December 19, 1993), known professionally as Young K (), is a South Korean musician, singer, songwriter, and rapper. He is best known as the bassist and vocalist of South Korean
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b62dbc4dfa3376e5d12d79530d6ac6516a9e58e0e95de626e46708ec420e6d. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82024a05-3187-4636-89e3-19a633b71d0c.json and https://artists.proofprofile.net/proofs/artist/82024a05-3187-4636-89e3-19a633b71d0c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).