Bridges have a trust problem. A bridge is a way to pass messages between chains — moving assets, state, and instructions from one execution environment to another. Simple concept. But every bridge needs to answer one question: is this cross-chain message legitimate? Most bridges answer it by trusting someone like a DVN, a multisig, a relayer. That someone is an off-chain verifier. And off-chain verifiers can be compromised, poisoned, or coerced. We have seen the consequences. The canonical bridge answers that question differently with cryptographic proof. Instead of trusting a verifier to say "this message is valid," the canonical bridge requires proof that it is valid. Generated off-chain. Verified on-chain by the L2 protocol itself. No trusted entity in the critical path. The protocol is the final arbiter. This has always been the most trust-minimized bridge architecture. But the problem was speed. Optimistic Rollups need 7 days to finalize. ZK Rollups take hours. So third-party bridges flourished — faster, but built on trust assumptions that could be exploited. Real-time proving changes this permanently. @puffer_unifi 's canonical bridge — what we call proof-generated bridging — combines the security of the canonical bridge with the speed of real-time proving. TEE proving is live today. ZK proving is on the roadmap. And proof-generated bridging is what makes synchronous composability real. When L1 and L2 can exchange cryptographically verified messages within the same Ethereum slot within the same block, same state, protocol-enforced validity, where L1 and L2 stop feeling like separate chains and start feeling like one execution environment. Cryptographic validity. Instant finality. No trusted third party. Synchronous composability across L1 and L2. The safest bridge is now also the fastest. That’s how UniFi handles cross-chain messaging. 🐡