1. A computer-implemented method, comprising: disseminating an Interest for a data collection; receiving a Content Object that includes a manifest for the data collection, wherein the manifest includes Content Object hash (COH) values for a set of other Content Objects of the data collection; determining a name prefix for a content-hosting service that hosts at least a portion of the data collection; generating a second Interest for a respective Content Object of the data collection, wherein the second Interest's name includes the name prefix for the content-hosting service, and also includes a COH value for the respective Content Object; and disseminating the second Interest to obtain the respective Content Object of the data collection.