I made them as far as ripping each respective company's logo and making them into buttons. I can't exactly claim ownership, but by all means use the too! BTW I checked out your music on Soundcloud and it's real juicy :)
Cool site. One thing though: please note that a Creative Commons button is meaningless when it doesn't link to a specific license (BY, BY-SA, BY-NC-SA...). Any of them would conflict with "all rights reserved" in the footer, too.
cool stuff!