This holds today and yesterday. Each row is a name somebody chose, a solve time, and a public key that is only valid for the day it was set on — so two rows by the same person on two days are two strangers to this box.
Two days rather than one because a run that starts before midnight UTC and finishes after it has to land somewhere. When a day falls off the end it is dropped: the memory is freed and the file is deleted. Nothing is archived, ever, and there is no endpoint that could serve the day before yesterday.
There is nothing to see here and nothing to sign up for.