Piracy is impossible to stop. If I can play something on ANY type of player, and that includes a vinyl turntable, I can run RCA inputs to my pc's sound card and record. It won't be a perfect copy, but with a top of the line sound card it will be close.
Also a PC will never be able to read a vinyl disc properly. Computers can only work with discrete data, such as the 0s and 1s on a cd; not continous analog data like those found on vinyl discs. Somewhere the pc must estimate the sound.