Methods for chain of custody tracking for an object are described. Several sets of Internet of Things (IoT) sensors are organized in a network. Each set of sensors is configured to record one or more events relating to the object. Each event includes an event time, an event location, and an entity that is a custodian for the object at the time of the event. When the object changes custodians, proper custodianship is verified based on input from at least one set of IoT sensors.