PREMIUM DOWN STANDARD requires independent third-party certification bodies to conduct annual audits for applicant organizations as part of the certification process. Leveraging the independence and professionalism of these third-party institutions, a "digital passport" for material circulation is established, enabling the transition from "claiming compliance" to "proving compliance." A reliable chain of custody not only serves as a tool to mitigate legal risks but also represents a strategic investment for enterprises in building a brand image centered on a "responsible supply chain." Enterprises must take standards as the foundation, technology as the instrument, and third parties as the shield to create a full-chain verifiable material custody system.