Only if it is edited off of the image. Once it is off the image, there is no other record in the image unless you have completed one of the meta data fields.
Many pros will keep the RAW image and create Jpeg variations for others to use as needed.
An advantage of using the meta data fields is the data is there no matter what conversion or revisions you do to the image.
The XMP/ITPC fields provide more information than just date, and photographer. Some of the other fields include a verbal description of allowed usage. I am aware of a Chicago photographer that created an image of the Chicago lake front skyline for the First Chicago Bank to use on their checks and he was paid for it. A number of years later, First Chicago used the colored image for their credit cards, not a specified use of the image, and the photographer sued and received a settlement for an unauthorized use or copyright violation. The camera will not allow all of the possible fields, but post processing software will provide the access. The cost of the attorney for the original negotiation and later suit were well worth the price for this photographer.
If you have the data in the Exif and someone removes it because it is more technical it might build a stronger case for the theft of intellectual property.