A single ESPO or Urals cargo in re-export often changes hands two or three times before reaching the end refiner. The legacy path rewrites and re-issues documents back-to-back at each leg, with bills in transit 3-5 days while capital sits tied up - cargo at sea, title not yet landed.

SNSUC's approach wraps the bill of lading, inspection and ownership change into a structured record, hashes each document with SHA-256, then writes the multi-leg flow as a hash tree - the parent node is the hash of concatenated child hashes, so any tampering with one fingerprint breaks the root match. Title can split 1/3-1/3-1/3; the buyer secures the corresponding uplift entitlement as each tranche is paid, with no need to wait for the full cargo to settle.

That makes 'title lands while cargo sails' possible: bank credit releases against the settled share, pulling re-export working-capital turnover from T+3 toward near T+0.