Downloadable image files authenticated by non-fungible tokens (NFTs); downloadable video files authenticated by non-fungible tokens (NFTs); downloadable music files authenticated by non-fungible tokens (NFTs); downloadable electronic publications authenticated by non-fungible tokens (NFTs); downloadable image files that enable transactions with non-fungible tokens (NFTs) utilizing crypto-assets and blockchain technology; downloadable video files that enable transactions with non-fungible toke...