Hi Tony,
Thank you for your feedback about our custom prints. Unframed prints do have the artwork credit note at the bottom of the print, however this is cropped out when framed. I'm sorry this wasn't made clear when ordering. I will pass your suggestion of the label on the back onto our print team and we can look at implementing something like this for future prints. Thank you again for your feedback, and I hope you enjoy your O'Keeffe print none the less.
Best wishes, Ruby, Customer Services