As the digital ad business grows, constant issues such as click fraud rate manipulation and the even more engrained opaque supply chains undermine transparency and fraud prevention that must be solved in the growing world of Audiences. In this study we have tried to analyze how smart contracts and blockchain technology framework to overcome these inefficiencies could be a verifiable decentralized automated. With secondary data, combined with case studies and industry analysis we explored the promise of distributed ledgers and automated transactions as a way to increase trust by removing middlemen to reduce advertising fraud. This paper is a comprehensive review of the literature, defines research gaps and offers a conceptual design based on smart contract logic blockchain architecture using oracles for data verification. Ad fraud trends and Blockchain Market Prognoses R statistical modeling with forecasts based on time series (ARIMA, ETS). Analysis of relative metrics based on comparisons in table format clearly reveal the vast improvements with ROI and cost-efficiency click-through rates and reduction in fraud for blockchain-based advertising systems on a system Image optimization inches Adex & Brave as studied real-world use cases Nevertheless the secondary database of this paper’s findings are limited in generalizability, but the results do demonstrate how blockchain can change digital advertising to