When I received the VOS the e-mail stated: "As of November 2013, the Operations Support Centre has been issuing an electronic, uncertified Verification of Status (VOS) document that confirms pertinent historical information retrieved from the original documents, such as date of entry and status at document issuance etc. You will not be receiving a plain paper, uncertified VOS document. Your electronic copy is acceptable at all Service Canada locations; however, please ensure that the watermark “NOT VALID FOR TRAVEL” appears on the document."
This is a replacement document for the CoPR so I am assuming it must be sufficient for the citizenship oath.