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ZeroSync and Blockstream to Broadcast Bitcoin Zero-Knowledge Proofs From Space
The partners say using zero-knowledge proofs will allow Bitcoin nodes to sync quickly from anywhere on earth, “even without Internet.”
Swiss non-profit ZeroSync Association and Bitcoin infrastructure firm Blockstream say they plan to broadcast Bitcoin zero-knowledge proofs – a type of cryptography that’s become one of 2023's hottest blockchain-tech trends – from Blockstream’s satellite.
Using zk-proofs to validate the Bitcoin blockchain means nodes don’t have to download the chain’s current 500GB of data and can therefore sync in fractions of a second instead of hours or days.
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We're excited to announce that today @adam3us, CEO of @Blockstream, agreed to partner with @ZeroSync_ to broadcast #Bitcoin ZK chain proofs via Blockstream Satellite!
— ZeroSync (@ZeroSync_) March 31, 2023
Fast sync from everywhere. Even without internet.
🚀🚀🚀🌎https://t.co/1ypzZOkQfq@StarkWareLtd @EliBenSasson pic.twitter.com/kcQpdP0YEt
Blockstream’s satellite network provides free global access to Bitcoin by broadcasting the blockchain to the entire planet, including areas with unreliable Internet coverage. ZeroSync expects the first experimental broadcast to take place by the end of the year.
The newly formed ZeroSync Association was launched on Tuesday and plans to help scale Bitcoin by using zero-knowledge proofs (zk-proofs), a cryptographic technique to prove the validity of information without revealing the information itself.
“The security of Bitcoin requires every participant to verify every transaction,” ZeroSync co-founder Robin Linus told CoinDesk. “That didn't scale well until now. Proof systems like STARKs have been invented. Applying them to generate a proof of Bitcoin's chain state, and broadcasting it via satellite, can bring Bitcoin to almost everyone in the world. Don't trust, verify.”
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Exchange Review - March 2025
CoinDesk Data's monthly Exchange Review captures the key developments within the cryptocurrency exchange market. The report includes analyses that relate to exchange volumes, crypto derivatives trading, market segmentation by fees, fiat trading, and more.
What to know:
Trading activity softened in March as market uncertainty grew amid escalating tariff tensions between the U.S. and global trading partners. Centralized exchanges recorded their lowest combined trading volume since October, declining 6.24% to $6.79tn. This marked the third consecutive monthly decline across both market segments, with spot trading volume falling 14.1% to $1.98tn and derivatives trading slipping 2.56% to $4.81tn.
- Trading Volumes Decline for Third Consecutive Month: Combined spot and derivatives trading volume on centralized exchanges fell by 6.24% to $6.79tn in March 2025, reaching the lowest level since October. Both spot and derivatives markets recorded their third consecutive monthly decline, falling 14.1% and 2.56% to $1.98tn and $4.81tn respectively.
- Institutional Crypto Trading Volume on CME Falls 23.5%: In March, total derivatives trading volume on the CME exchange fell by 23.5% to $175bn, the lowest monthly volume since October 2024. CME's market share among derivatives exchanges dropped from 4.63% to 3.64%, suggesting declining institutional interest amid current macroeconomic conditions.
- Bybit Spot Market Share Slides in March: Spot trading volume on Bybit fell by 52.1% to $81.1bn in March, coinciding with decreased trading activity following the hack of the exchange's cold wallets in February. Bybit's spot market share dropped from 7.35% to 4.10%, its lowest since July 2023.
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