ZeroSync is spearheading the development of proof systems for Bitcoin. Utilizing groundbreaking cryptography, ZeroSync is paving the way for Bitcoin scalability, interoperability, and privacy. Its first major application will be to broadcast chain proofs from space via the Blockstream Satellite, allowing everyone to quickly sync the Bitcoin blockchain almost anywhere on Earth. Its developer toolkit enables a next-generation ecosystem with powerful tools for Bitcoin developers to apply zero-knowledge proofs to their own products and services.