Retail store services featuring virtual goods, namely, jewelry, postcards, posters, photographs, photograph albums, books, magazines, purses, bags, furniture, towels, blankets, clothing, headwear, footwear, toys, games, homes, buildings, vehicles, food, and drink for use in online virtual environments; on-line retail store services featuring virtual merchandise, namely, jewelry, postcards, posters, photographs, photograph albums, books, magazines, purses, bags, furniture, towels, blankets, clothing, headwear, footwear, toys, games, homes, buildings, vehicles, food, and drink for use in online virtual environments; provision of an online marketplace for buyers and sellers of downloadable digital art images, audio files, video files, image files, jewelry, postcards, posters, photographs, photograph albums, books, magazines, purses, bags, furniture, towels, blankets, clothing, headwear, footwear, toys, games, homes, buildings, vehicles, food, and drink authenticated by non-fungible tokens (NFTs); compiling indexes of information using blockchain technology