In a digital world saturated with synthetic media and AI-shaped narratives, the quest for trustworthy public information has never been more urgent. Governing Public Information in the Age of AI explores how blockchain can strengthen the integrity of online communication at a moment when traditional platforms struggle to keep pace with algorithmic manipulation. Based on extensive field research, developer insights and real-world use cases, the book traces how distributed ledgers, tokenized incentives and decentralized identity tools can help verify content, track provenance and support more authentic exchanges across social networks. It unpacks both the promise and the limits of these systems, offering a clear look into emerging models that seek to counter deepfakes, misinformation and automated persuasion. Engaging and timely, the book will appeal to policymakers and scholars searching for practical ways to rebuild public confidence in information environments facing unprecedented disruption.