I wonder if some sort of "do not call"-style list that the government keeps would do the trick? The government maintains the list so some company can't say, "We

I wonder if some sort of "do not call"-style list that the government keeps would do the trick? The government maintains the list so some company can't say, "We never received any notice from them!" and the government can also audit whether each person on the list has data associated with them in any given company's database. The government would have to audit companies when a consumer contacts them (or just do it periodically for all companies, if that's feasible). I think the bigger problem is how does a consumer know whether any random company has data on them? I mean, sure, I can figure that Google, Amazon, and Meta probably would be on that list, but the real problem is all the smaller 3rd party resellers of such data. I don't even know their names, let alone how I would figure out if they have info on me.