12. The non-transitory computer-readable storage medium of claim 9 , wherein determining that the rendered document is protected by copyright comprises: determining that the rendered document is protected by copyright based on the electronic counterpart.
13. The non-transitory computer-readable storage medium of claim 12 , wherein determining that the rendered document is protected by copyright based on the electronic counterpart comprises: identifying copyright metadata associated with the electronic counterpart; and determining that the rendered document is protected by copyright based on the identified copyright metadata.