Downloadable image files containing artwork and meme images authenticated by non-fungible tokens (NFTs); downloadable image files containing artwork authenticated by non-fungible tokens (NFTs); downloadable image and multimedia files containing artwork and meme images relating to pets, cats, dogs, eggs, monsters, and other animal-like figures, authenticated by non-fungible tokens (NFTs) utilizing blockchain technology; downloadable digital art images authenticated by non-fungible tokens (NFTs)