In light of the rapid evolution of the digital economy, the proliferation of data has played a pivotal role in stimulating innovation while simultaneously fostering the proliferation of illicit data markets. This phenomenon has given rise to significant concerns regarding breaches of privacy and infringements upon data security. In response to this multifaceted challenge, we propose an integrated system model that encompasses several critical components, including database asset scanning, concurrent data exportation, data transmission and processing, and blockchain-based evidential traceability operations. These components collectively serve to bolster the credibility and efficiency of data transactions. Through a rigorous analysis of empirical data, we substantiate the efficacy, security, and reliability of this system, thereby surmounting the limitations inherent in conventional data trading platforms. This noteworthy achievement has successfully established a trustworthy and efficient data trading environment, thereby fostering the growth of the data trading market and making a valuable contribution to the sustainable expansion of the digital economy.