Bitkey Proposes Chain Code Delegation for Privacy-Enhanced Bitcoin Multisig

The evidence from the provided sources strongly and consistently supports the statement that Bitkey has proposed 'Chain Code Delegation' for enhancing privacy in Bitcoin multisig setups. 1. **Direct Attribution:** Multiple sources directly or indirectly attribute the proposal to Bitkey. The most direct is Source 5 (Bitcoin Archive), which explicitly states, "Bitkey introduced a proposal called 'Chain Code Delegation' for use in multisig." While a news aggregator, this is corroborated by primary sources. Source 3 is a social media announcement of the proposal by Jurvis Tan, who is confirmed by Source 9 (LinkedIn) to work at Block, the company behind Bitkey. Furthermore, the official Bitkey development blog (Source 1) confirms they are introducing a "proposal" specifically related to privacy and soliciting feedback, which aligns perfectly with the timeline and subject matter.2. **Proposal Name and Purpose:** The existence and name of the proposal, 'Chain Code Delegation,' are confirmed by the primary technical proposal itself on Delving Bitcoin (Source 2) and by its inclusion as a topic in a technical community discussion (Source 4). The purpose of enhancing privacy is clear from the proposal's title, "Private Access Control for Bitcoin Keys" (Source 2), and the description in Source 5, which notes it is used to "avoid revealing information."3. **Context (Multisig):** The context of multisig is also well-supported. Bitkey's official product website (Source 7) describes their wallet as a 2-of-3 multisig setup, making it logical that their technical proposals would be relevant to this architecture. Source 5 also explicitly mentions its use "in multisig."4. **Consistency Across Sources:** There are no contradictions in the provided evidence. High-authority primary sources (the proposal itself and the Bitkey blog), announcements from involved parties, and secondary reports from news aggregators and community groups all point to the same conclusion. The critical analyses (Sources 6 and 8) focus on other aspects of Bitkey's model but do not dispute the existence of this specific proposal. In summary, the combination of the official proposal, the announcement by a key employee, the corroboration on the official company blog, and reporting from third parties provides a high degree of confidence that the statement is true.