Across the Block ecosystem, brands like Cash App, Square, Spiral, Proto, and Bitkey are helping make bitcoin more open, accessible, and usable. From payments and mining to self-custody and education, we’re proud to be part of a global network building financial freedom for everyone. 🌍 Watch Ivy Galindo's story and see how bitcoin is changing lives:

Bitcoin

Bitcoin

Discover how Block advances bitcoin—Cash App and Square payments, Bitkey self-custody, and Proto mining—expanding access for millions worldwide

Security, privacy, and ease of use shouldn’t be at odds. To help close the gap, Bitkey engineer Jurvis Tan and Bitkey alum Jesse Posner proposed a new bitcoin improvement that allows multisig wallet owners to control which keyholders can see full balance and transaction data. Read more to see how this moves bitcoin forward:

Bitkey: Self-custody bitcoin wallet

Chain Code Delegation: Improving privacy in collaborative multisig

Collaborative custody and multisig setups have long faced a tradeoff between safety and privacy. Sharing a key with a third party—whether for rec...