Lifted straight from the cheapass "Ultimate" Edition of the game, I present to you the official links to the MP3s for the soundtracks and music of the games :-
God of War Trilogy soundtrack
God of War Blood & Metal EP
It's common knowledge by now that Sony is too scrooged to include a hardcopy of the music on CDs and choose to print the URLs on a piece of paper. And since Sony put the digital tracks up on the public domain on a unsecured server, it's only fair that people should share the links .