A selection of a digital content item is received from a client over a network. A license agreement associated with the selected digital content item is identified based on a content ID of the digital content item, where the license agreement is identified by a license ID. The license agreement includes one or more constraints for accessing the digital content item. A tracking code is generated based on the content ID associated with the selected digital content item, the license ID associated with the identified license agreement, and the user ID associated with the client. The tracking code is inscribed on the digital content item to generate a deliverable content file, where the deliverable content file contains the digital content item therein. The deliverable content file is transmitted to the client over the network, where the tracking code is visible or audible when the digital content item is accessed from the deliverable content file.