Hydroponics is a soilless plant cultivation technology using nutrient solutions in water. The development of hydroponic agriculture globally and in Indonesia is increasing, which correlates with hydroponic vegetable production. There is a safety issue for hydroponic vegetables in diseases and poisoning cases due to contamination related to the product supply chain's security issue amid the coronavirus pandemic or COVID-19. The laws and regulations about hydroponic vegetables' traceability encourage companies to adapt and implementing the rules to give consumers trusted information. One of the tools to ensure food supply chain information and transparency is a traceability system. The study aims to design a traceability system using a rapid structured prototyping approach that combines the System Development Life Cycle (SDLC) and Prototyping methods. This study examined the traceability system in the hydroponic vegetable business process and reviews its authenticity by developing a traceability system prototype using blockchain technology.