{"found":[{"type":"container","raw":"MSKU1234565","normalised":"MSKU1234565","valid":true,"check_digit":{"expected":5,"actual":5},"details":{"owner_prefix":"MSK","equipment_category":"U","equipment_category_label":"Freight container","serial":"123456"},"_source":{"type":"methodology","standard":"ISO 6346","reference":"ISO 6346:2022 — Freight containers — Coding, identification and marking (check-digit algorithm unchanged since ISO 6346:1995); container owner codes administered by BIC","authority":"ISO","source_url":"https://www.freightutils.com/validate","computed_by":"freightutils.com"}}],"disclaimer":"Structural validation only — a valid check digit means the identifier is well-formed, not that the container/shipment/vessel exists or is active. Not a registry lookup, and not legal or compliance advice."}