Minecraft isn't the only voxel based game out there, evidently so by looking through the vast catalogue of publishers and developers which created their own.
Microsoft chasing after other games similar to Minecraft stinks like Nintendo chasing after anyone who dares to put animals not akin to real-life mammals into their games. Disgusting business practice, however at least Nintendo built their own IP, Microsoft hasn't imagined anything original since Halo games.
Going to be hard to prove considering you cannot own voxel-based games as a concept, en masse!