Bittensor is an open-source protocol that powers a decentralized, blockchain-based machine learning network. The network allows machine learning models to train collaboratively and be rewarded with TAO tokens for the informational value they offer the collective. External access is granted, allowing users to extract information from the network while tuning its activities to their needs. The ultimate vision is to create a pure market for artificial intelligence that incentivizes interaction between consumers and producers in a trustless, open, and transparent context. Bittensor enables the development and distribution of artificial intelligence technology through open access/ownership, decentralized governance, and leveraging globally-distributed resources of computing power and innovation while rewarding value-added users.