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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3660b5e97837e4f915df60144a12ed3ea94cf9758479e8440b92d489c27ba3d. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca396cfb-0008-46ec-93f0-ec1c476a9b4d.json and https://artists.proofprofile.net/proofs/artist/ca396cfb-0008-46ec-93f0-ec1c476a9b4d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).