Copies or photographs of originals are what you need for your ancestor hunt. Here is an example of a marriage record. Be aware that records will vary from place to place. Some contain only the basics, others have the name of the father and mother of the groom and the bride and other details.
Another Example of Marriage Record:
A marriage record is generated at the time of the event (or thereabouts) and in the lifetime of the primary actors. This is as good as it gets.