The Bitcoin project was registered by Satoshi Nakamoto on Source Forge, a community collaboration website

The registration of Bitcoin on SourceForge on November 9, 2008, marks a pivotal moment in the history of bitcoin. This event  representing the transition from an idea to a tangible project available to developers and enthusiasts worldwide.

SourceForge was a well-known collaborative platform that distributed open-source software, making it an ideal place for Bitcoin’s initial codebase and development efforts to be hosted. This allowed for a collaborative environment where developers could contribute to the project, report bugs, and download the software.