David Chong Kok Kong () is a lawyer and business owner. Chong is the founder and president of the Portcullis Group, which provides wealth advisory services. He is the executive chairman of Fusang – th
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d2a93207c81aae0e9a14df089ebe598e913854f95a9cc1c4d3e85cb1584ef2. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64027a30-1982-4744-9f3f-91e3a7f32853.json and https://artists.proofprofile.net/proofs/artist/64027a30-1982-4744-9f3f-91e3a7f32853.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).