SNSUC's digital warehouse receipt builds its trust anchor in the browser, not on a central server. When the title holder opens the receipt page, the front end runs SHA-256 over four fields — bill-of-lading number, warehouse code, weight and timestamp — and writes the 256-bit digest straight to the ledger, with the raw hash never leaving the local device. That means even if the backend database is breached, an attacker cannot forge a title certificate: altering one record would require changing the on-chain hash, which is public and verifiable by anyone.

The ESG carbon-footprint layer now rides the same pipeline. For each batch, the voyage distance from load port to the Zhoushan bonded tank, bunker consumption and number of transshipment legs are converted into CO2 equivalent and written to the ledger alongside the receipt hash. A buyer enters the receipt number on the traceability page and sees where the cargo came from, how far it travelled and how much carbon it emitted — three facts verified in one pass. For a transshipment intermediary, binding real goods and real carbon into one chain removes the back-and-forth of commissioning a separate third-party carbon audit.