In international trade, customs clearance fulfills complex and country-specific tasks in the execution of supply chain processes. Importers and exporters have to integrate customs authorities into the information flow, as customs authorities require information, e.g., on the bill of lading and the commercial invoice apart from the customs declaration. In addition, involved sub-service providers increase the problem of information asymmetry and the required coordination effort. Practice and research consider Distributed Ledger Technology (DLT) as a potential solution since this technology maintains a mutually agreed and secure database of value-creation partners. However, research has hardly investigated the design of such DLT systems. Therefore, we present a requirements catalogue, a concept, and a prototype of a DLT platform to address the outlined problem of information asymmetry, especially with a focus on customs processes.