Who operates those checkpoints? Isn't there going to be some sort of implicit trust there? Even if somehow you built a machine that executes instructions that i

Who operates those checkpoints? Isn't there going to be some sort of implicit trust there? Even if somehow you built a machine that executes instructions that is verified on the blockchain, how are you going to make sure that machine's firmware is secure? edit: I think this is a valid thing to tackle potentially as a company, but right now it seems impossible.