You could use zero-knowledge proofs to prove that a given native binary was created from a specific compilation process and WASM binary. No privileged trusted a

You could use zero-knowledge proofs to prove that a given native binary was created from a specific compilation process and WASM binary. No privileged trusted authority necessary. Though any pre-compiled binaries would be browser version specific and CPU architecture specific, so it might be too much of a pain for browsers and websites to bother with yet for small gains.