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Addressing persistent challenges such as certification fraud, opaque supply chains, and the high costs associated with organic food production, stakeholders including farmers, processors, distributors, retailers, and consumers stand to benefit from the system\u2019s innovative approach. By leveraging blockchain technology and a robust system architecture, the proposed system offers enhanced transparency, improved traceability, and streamlined certification processes. Through detailed exploration of key components such as user interfaces, smart contracts, consensus mechanisms, IoT integration, and governance frameworks, the paper illustrates the practical application of blockchain technology in improving transparency and traceability throughout the food supply chain. A case study focusing on the organic Tofu supply chain further demonstrates the system\u2019s potential to enhance sustainability, efficiency, and integrity in organic food production and distribution networks. On the other hand, the paper presents a validation through simulation that compares the blockchain\u2010based system with traditional centralized systems across critical metrics, including certification latency, cost\u2010efficiency, and energy consumption. Results demonstrate the system\u2019s superior scalability, traceability, and cost stability, with significantly reduced latency and enhanced robustness under increased load. 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