Many BTC layer 2s on the market now claim to be "trustless" systems, but if you take a careful look at the mechanism design, you'll find that many have a critical flaw: the withdrawal path is not secure enough. Especially in the previous version of BitVM2, there was a typical issue—if the Operator maliciously forks the state chain, it could forge a "seemingly problem-free" zk proof to withdraw real BTC from Layer 2.

@GOATRollup BitVM2 is a complete overhaul specifically designed to address this vulnerability. Its core logic is: no matter how you tinker in Layer2, all withdrawals must be validated by the BTC main chain to count. This is not about "coordinating after a problem arises," but rather directly preventing the path of "forged states + generating false proofs" from a mechanistic standpoint.

GOAT uses a decentralized sorting network, with each block carrying a signature, and both the block header and signature are published on the Bitcoin main chain. This is equivalent to giving each operation a "main chain seal." All zk proofs must match this on-chain state, otherwise they are directly invalidated, leaving no loopholes.

The withdrawal path has also been redesigned into a three-step process of "burning + proof + withdrawal". If you want to withdraw, you first need to burn your PegBTC on Layer2, then the Operator must provide an SPV proof recognized by the main chain before the BTC can be truly released. This mechanism is very rigid and relies entirely on code execution, with no one able to "intervene".

The most ruthless aspect is that it has added a challenge mechanism—if either party commits fraud, anyone can initiate a challenge. The entire process is executed in the Bitcoin native script, without the need for a DAO, without arbitration, relying solely on the protocol to resolve it. This "anti-dishonesty" design is really practical.

For BTC Layer 2, speed is not the primary concern; the bottom line is being able to exit safely and protect assets. GOAT BitVM2 does not optimize; instead, it puts trust back into Bitcoin itself, fundamentally rebuilding security. This structure is what truly means "trustless."