That said books, maps, and plans shall be carefully preserved, and shall be so kept, by additions from time to time, as to show the ownership of every lot or piece of real estate or subdivision thereof within the limits of such borough or incorporated town, with the succeeding transmissions of title from the time of the commencement of such plans, but nothing contained therein shall at any time invalidate any municipal or tax claim by reason of the fact that the same is not assessed or levied against the registered owner.