Hong Si-young (; born January 24, 1991), better known by his stage name Giriboy (), is a South Korean rapper and singer signed to the Standard Friends label. Career Giriboy began his musical career
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 0xbc081bde7f29d5e7759828172bb1e866cb460e6b75198796b6226db59b6a607a. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb8cccb3-cf3f-4e37-ba25-19ca077833d5.json and https://artists.proofprofile.net/proofs/artist/eb8cccb3-cf3f-4e37-ba25-19ca077833d5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).