N.C. Gen. Stat. § 47-85
All probates, acknowledgments, and private examinations of deeds and conveyances of land heretofore taken before masters in equity or masters in chancery in any other state are declared to be valid, and all registrations of such deeds or conveyances upon such probates, acknowledgments and private examinations, or any of them, are hereby declared to be sufficient. All such deeds and conveyances and registration thereof, and all certified copies of such registrations, shall be received in evidence or otherwise used in the same manner and with the same force and effect as other deeds and conveyances with probates, acknowledgments, or private examinations made in accordance with provisions of statutes of this State in force at the time and as registrations thereof and certified copies of such registrations. Nothing in this section contained shall have effect to deprive anyone of any legal rights acquired, before its passage, from the grantors in such deeds or conveyances subsequently to their execution, where the deeds or conveyances by which such rights were acquired have been duly acknowledged or probated and registered.
N.C. Gen. Stat. § 47-85