Thank you for reply Tomas. What is the best way to verify my ownership of image? Do you have any procedure? I've got small portfolio on various stock agencies, but Fotolia the only agency there my nickname same like on Steemit (Grinder82) You can search on Fotolia for "Glacier bay" and you'll find my photo and portfolio. I can provide original NEF file from my camera if its needed.

DSC_003 is original raw file of this photo