Not sure if understand what you mean, but if you mean that black holes could eat up the traces of the past and make history inaccessible, then no, at least theo

Not sure if understand what you mean, but if you mean that black holes could eat up the traces of the past and make history inaccessible, then no, at least theoretically. I would assume that the current consensus is that black holes can not do this - which implies that the no-hair theorem is at best approximately true - but we only have unproven ideas which mechanism prevents black holes from destroying information. In practice recovering information from black holes is probably no easier than trying to recover the text of a book by inspecting the smoke of the fire you threw the book into.