YZi Labs has announced a follow-on investment in Sign, a blockchain company pioneering token distribution and verifiable digital credentials, following its initial funding in December 2024. The move strengthens YZi’s long-term strategy to back real-world utility and sovereign blockchain infrastructure.
Founded in 2021, Sign has become a leader in on-chain identity and token management, serving over 50 million users and 200 projects through products like EthSign and TokenTable, which have processed billions in token transactions. Its omni-chain attestation protocol underpins national-scale blockchain applications, including Sign Pass, an on-chain “Green Card” developed with the Government of Sierra Leone.
— YZi Labs (@yzilabs) October 21, 2025
With new funding, Sign will expand its focus to national blockchain systems that enable sovereign digital assets and verifiable credentials. The company is working with BNB Chain to develop compliant infrastructure for national stablecoins, positioning BNB Chain as a settlement layer for sovereign applications.
Sign’s new whitepaper, Sovereign Infrastructure for Global Nations (S.I.G.N.), outlines plans to deliver blockchain-based public services to 40 million people within a year. Its global team, spanning Harvard, Cornell, and UC Berkeley alumni, will drive product innovation across finance, regulation, and cryptography.
“The crypto industry is rich in technology but poor in adoption,” said Xin Yan, CEO of Sign. “Our mission is to build digital infrastructure for sovereign nations, covering money systems, credentials, and governance.”
YZi Labs’ partner Dana H. added: “Sign’s work on BNB Chain is redefining blockchain’s role in society. From enterprises to entire nations, this evolution is what digital sovereignty truly means.”