The commissioners shall return such plats to the respective courts by which they were appointed, together with their report of the performance of their duties in ascertaining and establishing the line, which report shall fully describe the line. If the report meets the requirements of this article and is unanimous, the courts shall approve the report. The courts shall direct that the approved report, together with the plat, be recorded in the deed books of their respective clerks’ offices and indexed in the name of each locality. The courts shall certify a copy of the report to the Secretary of the Commonwealth. In all controversies thereafter concerning the location of the line, the reports and plats shall be taken as conclusive evidence of its location.