Fiamma Labs mainnet goes live with its trustless Bitcoin bridge, connecting 11 chains and unlocking BTC liquidity for DeFi and RWAs.
Author: Chirag Sharma
August 6, 2025 , Fiamma Labs has officially launched the Fiamma Bridge on mainnet, marking a pivotal moment in the evolution of Bitcoin interoperability. This new bridge is being celebrated as the first trust-minimized Bitcoin bridge, offering non-custodial access across 11 major blockchain networks.
By allowing native BTC holders to borrow, earn yields, and make cross-chain payments, the Fiamma Bridge is addressing long-standing limitations in Bitcoin programmability. Backed by investors like FactionVC and L2 Iterative Ventures, this product is designed to unlock trillions in dormant BTC liquidity. With successful alpha and beta testnets already completed—logging nearly 2 million transactions and over 150,000 users—this mainnet launch is expected to bring immediate traction and attention.
At the heart of the Fiamma Mainnet is BitVM2, an advanced virtual machine layer built for Bitcoin. It enables optimistic ZK (Zero-Knowledge) proof verification directly on the Bitcoin network—without relying on centralized custodians. This allows the bridge to operate in a “pragmatically trustless” way.
Here’s how it works:
Some notable technical breakthroughs:
Future upgrades will eliminate the need for operator liquidity, making it more capital efficient and scalable. This new design aims to solve the classic Bitcoin bridging trilemma—trust-minimization, capital efficiency, and multi-chain flexibility—without compromise.
The launch of the Fiamma Bridge could transform Bitcoin’s role in decentralized finance (BTCFi). For years, Bitcoin has remained largely outside the DeFi ecosystem due to its limited scripting capability. Now, with Fiamma’s infrastructure, native BTC can interact with DeFi and RWA ecosystems securely.
This might unlock the door for:
Given the current spotlight on Bitcoin ETFs and institutional products, this infrastructure could be the missing piece in turning Bitcoin into an active DeFi participant. Industry experts are already calling Fiamma’s system “the most secure BTC bridge design yet.”
With plans for further decentralization and more chain integrations, Fiamma Labs could to lead the charge in next-generation Bitcoin infrastructure.
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