UnsignedMusicz
UnsignedMusicz is a project dedicated to sharing the music from the underground scene and helping out those artists, which many have not head of (yet!). The ultimate goal of the guy standing behind UMZ is to combine his own creativity either from filming or editing visuals to create art worth experiencing that channels in something more than just a sum of the parts.
Contact
The best way of contacting UnsignedMusicz is directly via their official email address. However, there is a form dedicated to demo submissions on their official website.