The hard problem in digital warehouse receipts is not storage but title — who owned the receipt at what moment, and whether anyone can verify that independently afterward. SNSUC hashes the receipt's key fields (grade, quantity, delivery warehouse, owner, validity) with SHA-256 directly in the browser, producing a 64-character hexadecimal fingerprint that is then written to a chain or a trusted log. The raw data never leaves the terminal; the owner exposes only the fingerprint.

Why in the browser rather than the backend? Two reasons. Latency: a holder photographs the delivery note on a phone, and local fingerprinting takes milliseconds instead of waiting on a server round trip. Minimised trust: if the backend handled plaintext, it would become a tamper and leakage surface; browser-side processing is zero-knowledge, leaving only the endpoint itself as the attack surface.

Timestamping uses the same fingerprint paired with a trusted time source. In a title dispute, any party recomputes SHA-256 from the original fields; a match with the on-chain fingerprint proves the fields were unaltered, and the timestamp settles the order. This replaces the paper receipt's stamp-plus-courier cycle, cutting dispute handling from weeks to seconds.

ESG carbon footprint is the natural extension of this chain. Each of the 13 categories carries its own set of emission factors (extraction, ocean freight, storage, delivery), and once a receipt is fingerprinted, the cumulative carbon from wellhead to delivery warehouse is bound to it. When a buyer files Scope 3 disclosure, it reads the receipt's attached carbon field instead of commissioning a fresh third-party measurement. Title and carbon data are anchored by the same fingerprint — tamper-resistant and one audit lighter.