Today, losing your hardware wallet is fine. Your recovery phrase gets you back in. In a post-quantum signing setup, the device also holds state: a running count of how many times it has signed. That state matters for security. SHRINCS is designed so that if the device is lost, the recovery phrase loads into a new one and falls back to a path that needs no state at all. The fallback needs no state, so a lost device is never a lost wallet. More expensive to spend from, but always accessible. Blockstream Research Director Jonas Nick on building a post-quantum scheme that stays safe even when hardware fails:

Blockstream

OP_CHECKSHRINCS: A Hash-Based Signature Opcode for Post-Quantum Bitcoin

OP_CHECKSHRINCS is a proposed Bitcoin opcode for post-quantum signatures whose security rests on SHA-256, the hash function Bitcoin already uses.

Getting off an exchange shouldn't be hard. Jade Core is the simplest way to hold your own bitcoin, built for anyone taking self-custody for the first time. @Adam Back on the thinking behind it.

Satoshi chose secp256k1 for Bitcoin’s cryptography. Jonas Nick and Blockstream Research are among the co-maintainers of libsecp256k1, the library every Bitcoin node runs to implement it. Researching what comes next is a natural extension of that work.

The Blockstream Explorer API is home to one of the fastest ways to sync a Bitcoin wallet. With QuickSync, you send one descriptor and get the complete history back in a single response. Grab an API key and see it for yourself. 🔗

Blockstream Explorer

Supply chain attacks are real. Before you use a new Bitcoin hardware wallet, check the tamper-evident seal, then run a genuine check (if it has one). Jade performs a cryptographic handshake with Blockstream to confirm it's running genuine firmware. Verify first, full send self-custody second.

Q2 was Blockstream moving from research to release. Blockstream Research took post-quantum Bitcoin from a live deployment on the @Liquid Network to OP_CHECKSHRINCS, a signature opcode the whole network can evaluate. Blockstream Jade became a three-model lineup, with the new Jade Core turning self-custody into a five-minute move off an exchange. Liquid published a roadmap that puts 0-conf and a trust-minimized bridge on the calendar. Core Lightning strengthened node architecture with bwatch, while the Explorer API kept blockchain data fast and dependable at enterprise scale. Blockstream's Q2 2026 Quarterly Update is live.

Blockstream

Blockstream Quarterly Update - Q2 2026

From a proposed post-quantum opcode to a reimagined Jade lineup and a Liquid roadmap with dates, here's what Blockstream shipped in Q2 2026.

Bitcoin's neutrality is its edge. @Adam Back on why a decentralized asset with no company in control wins: rivals won't build on each other's chains, but everyone can build on Bitcoin.

Simplicity's site just got a full redesign. Simplicity lets you prove exactly how a contract behaves before it goes live. No surprise fees, no transactions failing mid-execution. The security guarantees are part of the language, not bolted on after. Live on the @Liquid Network mainnet, running real financial contracts, and built for the developers and institutions building high-assurance Bitcoin applications.

Blockstream

Welcome to the New Simplicity | Blockstream

Simplicity has a new home. Explore the redesigned simplicity-lang.org.

Bitcoin started as a discovery, not an invention. @Adam Back explains why on Bitcoin Suisse AG, plus the post-quantum migration and how Blockstream Research is preparing Bitcoin for it with OP_CHECKSHRINCS.

When Alistair Milne placed a bid for 18.7 million bitcoin, nostr:npub1qg8j6gdwpxlntlxlkew7eu283wzx7hmj32esch42hntdpqdgrslqv024kwthought: let's out-bid him.

Under 1 million addresses hold a whole bitcoin. There are about 59 million millionaires. The math does not allow one each. Every sat counts when there aren't enough whole coins to go around. Buy and self-custody in the Blockstream app

Blockstream: Bitcoin and digital asset infrastructure

Blockstream App: A multi-platform, feature-rich Bitcoin and Liquid Wallet.

Blockstream app guides you from your first bitcoin purchase to full self-custody, all inside one elegant, security-first Bitcoin experience.

Limited seats left for this one. Build formally verifiable lending contracts on ‪Liquid‬ with Blockstream and two of Switzerland's banking teams, hands on, July 2 in Zürich.

Smart Contract and Credits on Blockchain Bootcamp · Luma

Blockstream, Swisscom and Luzerner Kantonalbank are happy to invite you for a Liquid/Simplicity Boot Camp in the Swisscom Business Campus in Züric...

This Blockstream Jade Core walkthrough with nostr:npub1lr2zzf989mvf393y0tv39ara6a4vddkd6y87z784up9vl6ks6j3qtudl6ais the only setup video you need to start your self-custody journey. Unboxing, genuine check, recovery phrase, first transaction, it's all here 💪 "Do what you love and save in Bitcoin." Joe Nakamoto leads the way. Order your Jade Core from the Blockstream store and start your self-custody journey. CHEERSJOE https://store.blockstream.com/products/blockstream-jade-core

Exchange reserves are at their lowest level since 2020. The migration to self-custody is well underway. Is your platform ready for it? Start with a Blockstream Explorer API key. 🔗 

Bitcoin Explorer - Blockstream.info

Blockstream Explorer is an open source block explorer providing detailed blockchain data across Bitcoin, Testnet, and Liquid. Supports Tor and trac...

Bitcoin Explorer - Blockstream.info

Blockstream Explorer is an open source block explorer providing detailed blockchain data across Bitcoin, Testnet, and Liquid. Supports Tor and trac...

The world is already migrating to post-quantum schemes. SSH clients warn when a server can't negotiate one. Browsers are defaulting to post-quantum TLS where available. Jonas Nick of Blockstream Research on why a quantum threat to banking is no reason to leave Bitcoin unsecured.

We are so back. 🔄 Renote if you agree. ❤️ Like if this is delusional.

"Ultimately people can only sell once and the number of coins left on exchange is diminishing." - Adam Back on Bitcoin supply dynamics. Coins on exchanges are diminishing. The ones who move first stack the most.

Blockstream: Bitcoin and digital asset infrastructure

Blockstream App: A multi-platform, feature-rich Bitcoin and Liquid Wallet.

Blockstream app guides you from your first bitcoin purchase to full self-custody, all inside one elegant, security-first Bitcoin experience.

When the world can't agree on whose currency to trust, the value of Bitcoin's geopolitical neutrality comes to the fore. @Julian Figueroa breaks it down in the latest Exit Manual. If you're convinced, Blockstream Jade is where you take self-custody.

Blockstream Local came to Pontarlier BTC in France for an evening on Bitcoin basics. Attendees walked away with bitcoin self-custody knowledge and Blockstream Jade, hardware wallets to put theory into practice. Register your meetup with Blockstream Local to get educational resources and hardware wallets to support your community.

Redirecting…

Custody. Tokenization. Settlement. Smart contracts you can formally verify. Blockstream brought its full enterprise stack to The Crypto Valley Conference 2026 in Zug, just up the road from our European HQ in Lugano. With Adam Back, Sagun Garg, Stefan Keller, and Gianmarco Guazzo. Bitcoin infrastructure belongs at the centre of finance. See you next year.