All instruments of writing relating to mining claims copied into books of mining records or other records in the office of the county recorders of the several counties prior to February 20, 1873, shall, after February 20, 1873, be deemed to impart to subsequent purchasers and encumbrancers and all other persons whomsoever notice of the contents thereof. Nothing contained in this subsection shall be construed to affect any rights acquired or vested prior to February 20, 1873.