Testimony shall be taken in said proceedings to ascertain the amounts of said liens and the dates of the entry of the same, and the amounts of said liens and the dates of entry thereof shall be found as facts by the viewers in said proceedings. Certified lists of liens from the courts of the Commonwealth and the United States shall be prima facie evidence of the existence, dates, amounts, dates of entry and places of record of said liens, and unless modified or overcome by oral or documentary evidence, shall be conclusive upon the parties thereto.
16 P.S. § 5611