Andrew Choi (born December 25, 1980), is a South Korean singer and composer. He is best known for providing the singing voice for the character Jinu in the Netflix animation, KPop Demon Hunters (2025)
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 0x8377f4fc38e459f2006a0fecc88e99a7ddfbacb7f50b847bbc14c7f3d1b87416. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34c4e4ea-ee3d-4940-b216-55396e8d12a6.json and https://artists.proofprofile.net/proofs/artist/34c4e4ea-ee3d-4940-b216-55396e8d12a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).