[MichaelGG]

OK, but unminimized JS still has no bearing on trusted computing.

What about Intel TXT (maybe?) and the upcoming SGX? Although I've not seen details on how the key system works with SGX. But assuming each processor has a unique ID/public key signed by Intel, and assuming we trust Intel and assume it's not profitable/plausible for a darknet to undo Intel's hardware protection, SGX seems to be exactly what the OP is asking for.

[rainmaking]

Yes it does; the current state of the art of trusted computing is indeed "run open source on your own hardware", and unminifed JS does that. It's only, as of now, impractical, because the browser does not help with verification.

I was unaware of Intel SGX; sounds okay in principle, but I would consider the jury out until it's released and a the security community has weighed in.