Max Guise
@max_guise
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Building @Blocks
Albuquerque, New Mexico
Joined June 2020
Check out our bitcoin wallet hardware prototypes! And learn about how we build them here:
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RT @Bitkey: Across the @blocks ecosystem, brands like @CashApp, @Square, @spiralbtc, @protomining, and @Bitkey are helping make bitcoin mor…
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We need more privacy-by-design. Proud of our team for contributing ideas like this to bitcoin, and excited to adopt it to make Bitkey balances and transactions private for our customers!
Chain code delegation is now a BIP draft: it enables collaborative custodians to continue to help you with key management and recovery without losing privacy. https://t.co/TmFelHHuSR Coming soon to a Bitkey near you!
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Chain code delegation is now a BIP draft: it enables collaborative custodians to continue to help you with key management and recovery without losing privacy. https://t.co/TmFelHHuSR Coming soon to a Bitkey near you!
github.com
We propose a new BIP for Chain Code Delegation, a collaborative custody technique that involves privileged participants (delegatee) withholding BIP32 chain codes at key setup time from a delegator,...
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I’m so proud of our team. This BIP proposal is a huge privacy upgrade for multisig! 🧡 Even when sharing a key, you can now keep your wallet balance and transactions private. Bitkey implementation coming soon. Your wallet should be private — even from us.
bitkey.build
Collaborative custody and multisig setups have long faced a tradeoff between safety and privacy. Sharing a key with a third party—whether for recovery, policy enforcement, or convenience—has tradit...
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Hardware wallets are not enough. They solve secure signing—but then hand you a seed phrase, making you figure out security, recovery, and inheritance on your own. Self-custody requires more than signing. That’s why we built Bitkey. https://t.co/hCvmPygUqC
bitkey.build
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. It’s long been the rallying cry for bitcoiners to move...
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All wallets can be hit by supply chain attacks & all need software & internet to use bitcoin. Open source apps like Bitkey can be checked fast to see if they're hit. Even if you use other hardware if there's an attack you need to check companion apps like Sparrow are still safe!
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10 years from now Proto Rig will still be running. The hashboards will have changed. The firmware will have changed. The world around Bitcoin will have changed. The mission? Still the same. ⛏️ Less waste. Less downtime. More Bitcoin. https://t.co/TdjGV7yEzI
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Today marks the end of rip and replace Bitcoin mining. Proto Rig—the first miner built to be infrastructure. • Replaceable hashboards • Save 15–20% with each cycle • Works with legacy facilities setups Built by the team at Block to improve uptime for miners and decentralize
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The Proto miner hardware seems like a real step-change for ASICs. The reusable rig is amazing, now just swap out hashboards. The modularity and openness (software and hardware) will allow everyone to do a lot more with them, and for a lot longer.
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In recent months, @jesseposner and I have been developing an idea where collaborative custodians sign transactions via scalar tweaks, so they never have to hold an XPUB and limit what they learn about your wallet. It’s called Chain Code Delegation:
delvingbitcoin.org
Hi all, Over the past several months, @jesseposner and I have been exploring a new approach to collaborative custody called Chain Code Delegation. By withholding BIP-32 chain codes and sharing only...
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Could you buy Bitkey with bitcoin before? Nope, our bad. Can you now? Yes. Pay with bitcoin at https://t.co/OiuafdKLi2
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🔍✅ Just published a detailed, GPG-signed reproducibility report for Bitkey Android v2025.10.1 on WalletScrutiny. ✅ v2025.10.1 is reproducible https://t.co/pCAdYUUYvv
#Bitcoin #Android #ReproducibleBuilds #WalletScrutiny
walletscrutiny.com
Review of Bitkey - Bitcoin Wallet (verdict: sourceavailable)
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What does it mean to not have a seed phrase? Is it keyless? No—you’re still in control of private keys. Seed phrases are just one way to store them. Is it custodial? No—you hold 2-of-3 multisig keys. No one can move funds without you. Is it vendor lock-in? No—you can exit
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Seed phrases were a breakthrough for Bitcoiners. But they also handed users the hardest part of the problem: securing them. Bitkey takes a different approach. https://t.co/zRUJKXiCIR
bitkey.build
Losing your seed phrase is perhaps a bitcoiner’s biggest fear. And for good reason. When seed phrases came into existence more than a decade ago, they were a vast improvement in user experience...
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We're building Bitkey to eliminate the trade-offs in self-custody. And not just to bring new people into self-custody, but to make an incredible wallet for bitcoiners, too. And we're sharing what's next on our roadmap. We want to know what you're excited about and what you want
bitkey.build
Bitkey roadmap update, April 2025 Bitcoin custody has always been defined by tradeoffs. Privacy, safety, and usability have been inextricably linked, forcing users to choose which qualities matter...
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All those late-night tweets asking for dark mode? We heard you loud and clear. Dark mode is now live in the Bitkey app 🌙 because bitcoin doesn’t keep bankers’ hours.
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Bitkey’s first year has been one to remember—from being named one of @TIME's best inventions to making self-custody easier for bitcoiners worldwide. To celebrate, Bitkey is only $99 for a limited time. Take control of your bitcoin: https://t.co/OiuafdKdsu 🔒
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