SNSUC's data hub has brought batch-level product carbon footprint (PCF) into its blockchain attestation system. From refinery exit to bonded delivery, each batch's energy, logistics and process emissions are decomposed into auditable data points, and a browser-side SHA-256 fingerprint tamper-evidently binds the digital warehouse receipt — so carbon data stays traceable the moment title transfers. This closed loop serves two compliance scenarios directly: the national ETS expansion into petrochemicals (with a 2027 time window) and the EU CBAM carbon border adjustment (entering a deepened execution phase in 2026). Exporters can pull a third-party-verified PCF summary from an SNSUC digital receipt without duplicate reporting. For enterprise members, this upgrades carbon data from 'annual narrative' to 'on-chain asset': transferable with the receipt, externally auditable, and ready for buyers' ESG due diligence. SNSUC Research Institute will keep publishing per-category carbon-intensity benchmarks to anchor enterprise members' low-carbon procurement and green-power decisions.