The authenticity can be verified on JSA website. This Autographed 16x20 Foil Fine Art Giclee Limited Edition #9/10 has been Personally Signed by Chris Hemsworth of Thor Ragnarok. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by JSA Witness. This is a JSA Witnessed Protection Program item which means a JSA representative was present when this item was being signed. The authenticity can be verified on JSA website.