Chain Code Delegation has now been assigned BIP 89 — a big step forward for private collaborative custody in bitcoin. With privacy fully rolled out in the Bitkey app, customers who update now benefit from the first implementation of this emerging standard. A big moment for the ecosystem — and for self-custody.

GitHub

BIP 89: Chain Code Delegation for Private Collaborative Custody by jurvis · Pull Request #2004 · bitcoin/bips

We propose a new BIP for Chain Code Delegation, a collaborative custody technique that involves privileged participants (delegatee) withholding BIP...

Bitkey now has another top-tier buy partner. US customers can now buy bitcoin with Strike and move it straight into your Bitkey wallet in one smooth flow. Another step toward seamless bitcoin experiences.

You can now buy a Bitkey without giving up your home address. Ship to thousands of pickup points across the U.S. — FedEx, Walgreens, Kroger, Dollar General, and more. Pay with bitcoin, pick up privately, and stay in control.

Bitkey: Self-custody bitcoin wallet

Learn about Bitkey privacy in Bitkey Basics

We’re wrapping up 2025 with 0% fees on bitcoin buys when you pick Cash App in Bitkey — now through the end of the year. The banks might be holidazed (how many are we at now?) but bitcoin never rests. Happy stacking. Terms apply:

Bitkey x Cash App: 0%-Fee Bitcoin Buys

A bitcoin wallet to own your private keys. Bitkey includes an app, hardware wallet, and recovery tools in case you lose your phone, or hardware, or...