Bidcoin, dba Codex Protocol, is a decentralized title registry for Art and Collectibles. Codex stores ownership and provenance while ensuring privacy. Powered by the DEX native token, the Codex Protocol is open source, allowing third party players in the A&C ecosystem to build applications and utilize the title system. Codex's landmark application, Biddable, is a smart deposit-escrow system deeply integrated into the Codex protocol, solving the biggest issues faced in A&C auctions: non-performing bidders, lack of privacy, and barriers to market access.