9 Downloadable digital image, sound, and video files representing works of art, digital collectibles, authenticated by non-fungible tokens for use online and in online virtual environments; downloadable digital image, sound, and video files representing works of art authenticated by non-fungible tokens (NFTs) [NFTs] for use online and in online virtual environments; downloadable computer software for managing cryptocurrency transactions with the help of blockchain technology; downloadable virtual reality game software; downloadable electronic game software