He clearly said he bought the game so we can assume that he's speaking the truth.
As for the version, since you have just recently purchased the game, it has to be v2 since production of v1 stopped a long time back. If you got to know the version from the readme file, then that's wrong because R* forgot to change the version number in the readme.
A safe way to find out which version you have is to check the bottom corner of your main screen when the game starts. If you have v2, it'll say so. If not, there won't be anything.