Quarkslab, a cybersecurity firm, has completed the first public audit of Bitcoin’s open-source software, leading to positive results with no high or medium severity vulnerabilities identified. This landmark achievement marks a significant step forward for Bitcoin’s transparency and security commitment. The audit, funded by Brink and coordinated by the Open Source Technology Improvement Fund (OSTIF), focused on critical components of the Bitcoin Core system including P2P network protocols, transaction pool management, blockchain management, and consensus mechanisms. These areas form the foundation of Bitcoin’s infrastructure and any flaws could pose serious risks. Fortunately, the audit revealed a highly resilient system. 2 low-risk issues were identified, along with 13 recommendations for code and process improvements. While these suggestions represent minor areas for improvement, they offer valuable insights for enhancing the system further. This transparent process enhances user confidence and sets a high bar for security practices in the blockchain ecosystem.