Trust in a digital warehouse receipt does not rest on a stamp; it rests on a hash. The title elements — grade, quantity, custodian and lot — are hashed in the browser with SHA-256 into a 256-bit digest, and that digest is anchored on-chain. Any party who recomputes the hash from the raw data gets the same value or knows the record was altered.

Legacy verification meant pulling the custodian's ledger across time zones and institutions: slow and costly. With the hash on-chain, the buyer recomputes the same digest locally and compares it to the stored value — a verdict in seconds. Title moves from whose word to what the math says.

The ESG carbon footprint now rides in the same receipt as the title. Grade, route and load-port emission factors are written as structured fields and hashed on-chain, so the buyer cites them directly in a Scope 3 disclosure instead of commissioning a separate third-party report.

In scope, thirteen categories and the seven transfer grades — ESPO, Dubai, Oman, Urals, Basrah Light, Bonny Light and Lula — run through this same flow. Receipts are generated at the edge and attested on-chain, with private keys never leaving the user's environment; that is the core difference from a centralized ledger.