Does this Johnny cash autograph look genuine? I am going thru a bin of autographs i purchased and it is filled with photos from famous country music singers from the 1970s to 1990s. All this work was done by deb cope she had 27 years of experience as a free lance photographer. She was back stage at lots of events with well known artist, I have her resume so I know theres a very high chance it is authentic.

There is a indention on the back side that shows the pen strokes and the ink is spotty, it looks authentic but I would just like a second opinion before I sell it. Thanks!