Hands Up (sometimes stylized as Handz Up! or HandzUp!, also known as Dancecore in East Europe) originated during the early 2000s in Germany and various other parts of Europe. In its original incarnation, it was characterized by strong bass drums, pitch shifted vocals and 1970s disco like synths. Cascada, Groove Coverage and Italobrothers some of this scene's most popular acts. Nowadays (post-2010), Hands Up is a thriving genre with many artists and record labels. It is today considered an alternative form of hardstyle.
Hands up producers/projects: https://www.discogs.com/lists/Hands-up-producersprojects/283178
Hands up labels/series: https://www.discogs.com/lists/Hands-up-labelsseries/283169