Bitcoin Purity: A Peer-to-Peer Electronic Cash System Abstract Bitcoin was designed in 2009 by Satoshi Nakamoto as a purely peer-to-peer electronic cash system, enabling online payments to be sent directly from one party to another without going through a financial institution. For years, it functioned successfully as sound money, a trustless timestamp service, and a decentralized store of value. However, the legacy network has drifted from its foundational principles. The introduction of SegWit & Taproot opened the door to arbitrary data storage, and subsequent policy shifts in 2025 allowed inscriptions to commandeer the blockchain. Today, the vast majority of block space is consumed by non-financial data, introducing critical legal and technical risks—including the permanent embedding of illicit material—which threatens the survival of full nodes and miners alike. Bitcoin Purity is created to preserve Bitcoin’s original design by Satoshi Nakamoto: a pure monetary system, secure Proof-of-Work via SHA-256, and a concise scripting engine, ensuring that Bitcoin remains money and blocks are used strictly for financial transactions. https://downloads.bitcoinpurity.org/whitepaper.pdf