SNSUC's warehouse-receipt module now hashes title documents locally in the browser with SHA-256, then puts the hash on-chain — the original contract never touches our server. A 256-bit digest makes collisions negligible; the holder can verify the file is untampered before any handover.

This matters most for transshipment. STS ship-to-ship transfer, bill-of-lading endorsement, receipt assignment — every title move should leave an immutable trace. We run SHA-256 on the client through the Web Crypto API; one hash takes under 5 milliseconds, even on a phone, with no plugin needed.

The ESG carbon footprint now rides the same chain. Each batch's voyage leg, load and discharge ports, and measurement basis are stored as structured fields, and emissions appear on the deal ticket as a data point. Buyers running due diligence no longer need a separate letter to request a report. Supervisors are tightening the Scope 3 definitions; recording the data early saves the scramble later.

One boundary is firm: what goes on-chain is the hash and the structured summary, not the commercial playbook. Price, negotiation floor, and equity arrangements stay local; only the fingerprint needed for verification is public.