Which major online retailer partnered with the Smithsonian in 2015 to create an authenticated military memorabilia marketplace that used blockchain verification for item provenance?

The military collectibles and memorabilia market has evolved significantly over the decades. From local surplus stores to global online marketplaces, the way enthusiasts shop for historical military items has transformed with technology and changing consumer preferences. This poll tests your knowledge about an innovative retail partnership that revolutionized how military history collectors find authentic items.

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eBay's 'Valor Verified' program
Amazon's 'Heritage Arsenal' collection
Etsy's 'Battlefield to Bookshelf' initiative
Sotheby's 'Digital Military Archives' platform