An arbitrator receives a request to use a plurality of content in an aggregation. The arbitrator determines whether there exist proper rights to use the plurality of content in the aggregation. The requestor is communicated whether permission is granted. The determination may include negotiating for extending right of use by an arbitrator. This negotiation may communicate with content hosting service(s) or the content author(s). The determining step retrieves, stores, and maintains rights information to and from an information store which is accessible by the rights management system.