Lee Ji-rin (; born 1981), better known as Humming Urban Stereo () is a South Korean electropop singer-songwriter. The one-man band debuted in 2004 with the self-published extended play, Short Cake, wh
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 0x214b94130486be7157b5afb482631d0732a33de48f0568950b9eaae8e1bff1b0. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bf0b99e-9087-4ba3-80d7-c4f7f2a4be47.json and https://artists.proofprofile.net/proofs/artist/8bf0b99e-9087-4ba3-80d7-c4f7f2a4be47.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).