What it is
Bitcoin Core is the reference implementation of the Bitcoin protocol, first released by Satoshi Nakamoto. It serves as the primary software for running a full Bitcoin node, providing the rules and infrastructure for validating transactions and blocks, and maintaining the blockchain. It is an open-source project, with a global community of developers contributing to its maintenance and improvement.
Bitcoin Core's development and updates are closely watched by the Bitcoin community, as changes to its code often lead to network upgrades (soft forks). Debates over proposed changes or new features in Bitcoin Core are common in news about Bitcoin development and policy, impacting the network's future capabilities and security. Its robustness is central to Bitcoin's overall stability.
Why it matters
Bitcoin Core is the foundational software defining Bitcoin's rules. Its development impacts the network's future, security, and functionality.
Reviewed under editorial standardsUpdated September 26, 2026Not investment advice