Devices, systems, and methods for monitoring registration of a patient to a surgical robot are provided. The system (2000,2100,2200) comprises a dynamic reference base (2004) including at least one array marker (2006), a dynamic reference base post (2008) connected to the dynamic reference base (2004), and a surveillance marker (2002) disposed at a predetermined distance from the dynamic reference base (2004), wherein the surveillance marker (2002) is configured to be secured to a bony structure (2012) of the patient independently from the dynamic reference base (2004). The surveillance marker (2002) is configured to be registered to the dynamic reference base (2004) and the surgical robot is configured to determine that the dynamic reference base (2004) has moved based on a change in the predetermined distance.
