Provision of an online marketplace for buyers and sellers of goods and services; Provision of an online marketplace for buyers and sellers of downloadable digital files authenticated by nonfungible tokens (NFTs); Provision of an online marketplace for buyers and sellers of downloadable digital art images authenticated by non-fungible tokens (NFTs); Provision of an online marketplace for buyers and sellers of downloadable digital image files authenticated by non-fungible tokens (NFTs); Provision of an online marketplace for buyers and sellers of downloadable audio and video recordings authenticated by non-fungible tokens (NFTs); Provision of an online marketplace for buyers and sellers of downloadable multimedia files authenticated by non-fungible tokens (NFTs); Compiling indexes of information using blockchain technology; Operating online marketplaces featuring digital files authenticated by non-fungible tokens (NFTs); Operating online marketplaces for sellers and buyers of goods and/or services; Providing a website featuring an online marketplace for exchanging goods and services with other users; Providing consumer information in the field of cryptocurrency via a website; Providing commercial information in the field of cryptocurrency via a website; Providing consumer information in the field of digital files authenticated by non-fungible tokens (NFTs) via a website; Providing consumer information in the field of blockchain technology via a website; Providing commercial information in the field of digital files authenticated by non-fungible tokens (NFTs) via a website; Providing commercial information in the field of blockchain technology via a website; Providing consumer information via a website; Providing business information via a website