Systems, devices, methods and computer program products improve various aspects of a content management system. In one scenario, one or more contents are accessed at a content handling device. The content handling device is configured to operate using multiple abstraction layers including an application layer, an operating system layer, a firmware layer and a hardware layer. Content management operations are conducted on the one or more contents using at least two abstraction layers. Such content management operations include conducting watermark extraction and content screening operations at a first layer for a first watermark message having a first value, conducting watermark extraction and content screening operations at a second layer for a second watermark message having a second value, and initiating one or more enforcement actions corresponding to the first value and the second value based at least in-part on respective results of the content screening.