Christopher Chahn Bahng (born 3 October 1997), known professionally as Bang Chan (), is an Australian singer, rapper, songwriter, and record producer based in South Korea. Signed to JYP Entertainment,
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 0xcd7229ad0b5aedc7ab17e5837794b2f227720e78c4c42873e4b132a54fa99843. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42981305-f450-4000-92ba-f023ad181cd0.json and https://artists.proofprofile.net/proofs/artist/42981305-f450-4000-92ba-f023ad181cd0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).