This document discusses the convergence of blockchain and AI through decentralized AI approaches. It outlines challenges with centralized AI models regarding privacy, influence, economics and transparency. Decentralized solutions proposed include federated learning, blockchain, homomorphic encryption, and data marketplaces. Blockchain provides an open, trustless network to replace centralized authorities and enable applications like data exchanges, AI marketplaces and distributed machine learning across devices. Overall the goal is to democratize AI and data through user ownership and control.