Sapien is an open protocol for sourcing verified human knowledge at scale. Its network of millions of contributors spans more than 100 countries, ranging from doctors and engineers to artists and students. Together they produce high-quality AI training data, validated through Sapien's onchain Proof of Quality system. This ensures enterprises and AI developers can access trusted, human-in-the-loop data while transforming fragmented online work into a sustainable, reputation-based profession. Incentives across the network are powered by the $SAPIEN token, an ERC-20 asset on Base.