1. A system comprising: a storing unit configured to store first information and second information in association with each other, wherein the first information includes information indicating an output apparatus that has output an image, information indicating an output time of the image having been output from the output apparatus, and information indicating a user who has instructed the output apparatus to output the image, and the second information includes information indicating an original output apparatus that has output a source image of the image, information indicating an output time of the source image having been output from the original output apparatus, and information indicating a user who has instructed the original output apparatus to output the source image; an acquisition unit configured to acquire information indicating an output apparatus of an image and information indicating an output time of the image having been output from the output apparatus, from a coded image included in the image; a search unit configured to search the storing unit to find first information including the acquired information indicating the output apparatus and the acquired information indicating the output time of the image having been output from the output apparatus; and a display unit configured to display information indicating a user who has instructed an original output apparatus to output a source image of the image, of the second information stored in the storing unit in association with the found first information, if the search unit has found the first information including the acquired information indicating the output apparatus and the acquired information indicating the output time.