The EU CBAM enters its definitive period in 2026, and importers pay certificates against embedded emissions. Petrochemical transshipment runs long, opaque chains, so the legacy approach leaned on annual averages - noisy and easy to challenge.

SNSUC breaks each product's product carbon footprint (PCF) down to the physical lot: crude grade (ESPO, Urals and others), mode of transport, storage and delivery, with emission factors booked at every step into structured data points.

Trust is the crux. Each batch's PCF dataset gets a SHA-256 fingerprint computed in the browser and notarized on-chain; the buyer, regulator or auditor can recompute the same hash, so the signer cannot alter figures after the fact. That swaps trust cost for compute cost.

For the operator: a verifiable PCF lets CBAM certificates be paid on real emissions rather than a conservative ceiling, and the saving on a single batch drops straight to transshipment net margin. Digital receipts are bound to the PCF, so delivery carries its own carbon ledger.