Collaborative custody shouldn’t come at the cost of privacy. Chain Code Delegation removes a long-standing tradeoff in multisig wallets: safety or privacy. With it, cosigners can help with recovery or policy enforcement without seeing your balances or transaction history. This is already live in Bitkey — and it’s a meaningful privacy upgrade for bitcoin self-custody.

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...

How much bitcoin has been lost due to bitcoin mismanagement? Lost seeds. Phishing. Fires. Simple mistakes. That's why we removed the seed from the equation. One key. One device. No export. Multisig-based recovery.

Security that ignores human behavior isn’t security. Design matters.

What does “safety” actually mean in bitcoin self-custody? Bitkey Product Lead Jonathan Pollack explains why security alone isn’t enough — and how usability and privacy are just as critical to keeping your bitcoin safe. Full conversation with Simply Bitcoin: https://t.co/49JDjp7NQm

How to avoid seed phrase scams: Step 1: Use Bitkey.

Bitkey: Self-custody bitcoin wallet

The end of seed phrase scams

The easiest way to avoid seed phrase scams? Don’t use a seed phrase. Since the beginning of time, scammers have found ways to turn the misfortun...

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...

With Chain Code Delegation, Bitkey is the first multi-sig wallet that gives you recovery and security without giving up your privacy.

By implementing Chain Code Delegation, Bitkey becomes the first private collaborative multisig wallet — what you do with your keys is your business, simplifying self-custody is ours. Not our keys. Not our business.

Bitkey: Self-custody bitcoin wallet

Not our keys, not our business

How Bitkey used Chain Code Delegation to create the first private collaborative bitcoin wallet. Starting today, Bitkey users can enjoy the safety ...

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...

The true test of self-custody isn’t just whether or not you hold your own keys. It’s whether or not you can protect them from loss, theft, coercion, seizure, and death, and still be able to make transactions when you need to, without a third party intermediary.

Bitkey: Self-custody bitcoin wallet

Hardware wallets are not enough

Hardware is a critical component of self custody. But it only solves part of the problem. We all know the mantra: Not your keys, not your coins. ...

Passing on your bitcoin shouldn’t be a puzzle. Our inheritance feature is built to make it straightforward and secure. Set it up once. Protect it for a lifetime. Dive into how it works:

Bitkey: Self-custody bitcoin wallet

Learn about How Bitkey works in Bitkey Basics

What happens if you lose your phone? Your Bitkey still works. What if you lose your hardware? Still recoverable. What if you lose both? There’s still a path forward. Bitkey’s 2-of-3 security model ensures that even in less than ideal scenarios, your bitcoin is accessible. Learn how recovery works — in every scenario:

Bitkey: Self-custody bitcoin wallet

Learn about How Bitkey works in Bitkey Basics

Bitcoin isn’t just digital gold, it’s a test of trust. Every time you choose self-custody, you’re proving you understand what bitcoin really stands for: ownership, responsibility, and freedom.

“Creating a system that keeps your seed phrases secure and is resistant to all of these threats is a tall task to ask users.” – Jonathan Pollack, Bitkey Product Lead That’s why Bitkey is designed with a seedless recovery system. Our 2-of-3 key setup lets you recover your wallet even if you lose one of your signing devices — without the burden of seed phrase management. #LoseYourSeedPhrase Product Lead, Jonathan broke it down 👇

Portland showed up 🙌 At the Bitcoin is for Everyone conference, we had powerful conversations about self-custody, recovery, inheritance, and how to onboard your friends and family — safely. We met new customers, reconnected with OG supporters, and shared our vision for a more accessible, safer path to holding your own keys. Even more encouraging? So many attendees already owned Bitkey or had heard of us. Bitcoin self-custody is growing — and Bitkey is growing with it.

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BitcoinisforEveryone

The West Coast's Premier Bitcoin Conference | August 1, 2025 in Portland, OR Join us for our 2nd annual conference at Revolution Hall for a full-d...

Bitkey is built with bitcoin’s future in mind — long-term, unstoppable, and evolving. Self-custody isn’t going away. Neither are we.