SiriusHub is a human company specializing in (presumably) satellite radio, although it appears to be a much more advanced version then what our current technology allows. In particular, the ability to "...connect to SiriusHub and access anything you like...", shows that it is very advanced and capable. As well, it suggests that it also has the ability to download music, not just the ability to listen to it.
A radio from this company was included with the stock model of the '53 Civilian Warthog.
- The name SiriusHub suggests that this company is a descendant of the real world company Sirius Satellite Radio.