Digital BW, The Print

What would be the best combination of fine art paper and a stamp
method for applying a stamp on the back of large prints, 15 x 20 inch
and up ?

I've tried "Crane Museo Silver Rag" with an Xstamper (self inking).
The back side of the paper was not taking the ink easily and the
contour became bigger as the ink floated. It eventually dried
somewhat.

I then tried "Canson Platine Fiber Rag". The stamp dried much quicker
(back side is not coated).  However it seems that the ink enters into
the paper, shining slightly through to the front side!

I ended up writing all info by hand with a pencil - it was my first
sale of art for a collector.

Does anybody have experience with that issue? How would you put all
the art specs on the back of a photo using a professional looking
form?

Thanks,

Martin