SNSUC's digital warehouse receipts do not rely on a back-end server to mint the fingerprint. At the moment title transfers in the buyer's browser, the front end uses Web Crypto to compute a SHA-256 hash of the lot — a fixed 256-bit digest where flipping one byte in the source changes the whole output. That fingerprint, together with the bill-of-lading number, product, quantity and delivery warehouse, is submitted to the ledger.

Only the hash lives on-chain, not the commercial detail. That preserves tamper-proof title confirmation without exposing the bottom price or the negotiation line. When a regulator or buyer runs due diligence, they look up the bill number on the chain and confirm the lot's ownership genuinely changed at a given time and was never rolled back.

This round we also wired ESG carbon-footprint nodes into the same chain. Each crude batch's voyage emissions from load port to discharge port and the refinery processing energy, converted to tonnes of CO2 equivalent, are bound to the receipt hash. Downstream ESG reporting no longer needs a separate third-party transport carbon ledger — the on-chain node is directly auditable.