There is nothing open about that. You own none of it. Only usable within their walled off platforms.

Want to build an alternative player? Can’t do that. Support new or alternative hardware? Sorry, no API access. Want to record them onto a tape/CD/SD card? Forbidden. Want to play songs at your neighborhood party? Illegal. Use them for a funny video? Nope. Even sharing lyrics gets you a DMCA takedown request.