Name one court that signs warrants to service providers that can't be verified by spending 5 minutes doing some basic research, or that has a LEO office serving such warrants that also can't be verified.
The topic at hand isn't whether a lawyer or a court officer can, but whether EVERYONE can in a timely manner such that if a police officer or LEO (or someone impersonating one, since we're talking zero trust) can be told to go sod themselves by a layman.
Fundamentally this is a signal/info propagation problem. Processes take time.
I don't. Hell, even if I had a lawyer on hand, I doubt the lawyer would go "hold up.. checking the registries, yup it's legit"; rather they'd tell you to cooperate then maybe challenge outcomes down the road when the paperwork catches up.
For most, the answer is they take it on faith anyone usurping that authority would have such a shit ton of bricks dropped on them, no one would be stupid enough to do it. Obviously, that logic is showing it's age.
Frankly, if I were the courts/LE and found out this was going on, there'd be a new Public Enemy #1. Trust is too important.
Even more fun would be the process of jurisdictional verification. All of which I'm sure the "Officers" would be more than happy to leave you be with your electronics and whatnot long enough to verify, right?
Longer I'm alive, the more insane our system seems to me on a daily basis. Not sure if it's just cognitive decline or rapidly amplified cynicism as I dig into the signalling nightmare that is the interface between the executive and the judiciary system.