Integrating blockchain technology with the Internet of Things offers transformative possibilities for enhancing network security and privacy in the contemporary digital landscape, where interconnected devices and expansive networks are ubiquitous. This paper explores the pivotal role of artificial intelligence in bolstering blockchain-enabled IoT systems, potentially marking a significant leap forward in safeguarding data integrity and confidentiality across networks. Blockchain technology provides a decentralized and immutable ledger, ideal for the secure management of device identities and transactions in IoT networks. When coupled with AI, these systems gain the ability to not only automate and optimize security protocols but also adaptively respond to new and evolving cyber threats. This dual capability enhances the resilience of networks against cyber-attacks, a critical consideration as IoT devices increasingly permeate critical infrastructures. The synergy between AI and blockchain in IoT is profound. AI algorithms can analyze vast amounts of data from IoT devices to detect patterns and anomalies that may signify security breaches. Concurrently, blockchain can ensure that data records are tamper-proof, enhancing the reliability of AI-driven security measures. Moreover, this research evaluates the implications of AI-enhanced blockchain systems on privacy protection within IoT networks. IoT devices often collect sensitive personal data, making privacy a paramount concern. AI can facilitate the development of new protocols that ensure data privacy and user anonymity without compromising the functionality of IoT systems. Through comprehensive analysis and case studies, this paper aims to provide an in-depth understanding of how AI-enhanced blockchain technology can revolutionize network security and privacy in IoT environments.