42 Authentication, issuance and validation of digital certificates; Computer services, namely, hosting an interactive web site that allows users to create, view, store, display, share, purchase, sell, exchange, transmit, and/or transact non-fungible tokens, crypto collectibles, blockchain-related items and products, and/or digital assets; Cross-platform conversion of digital content into other forms of digital content; Data encryption and decoding services; Hosting an online website featuring non-fungible tokens, crypto collectibles, blockchain-related items and products, and/or digital assets; Hosting of digital content on the Internet; Platform as a service (PAAS) featuring computer software platforms for the purpose of users creating, viewing, storing, displaying, sharing, purchasing, selling, exchanging, transmitting and/or transacting non-fungible tokens, crypto collectibles, blockchain-related items and products, and/or digital assets; Providing a secure electronic online system featuring technology which allows users to create, view, store, display, share, purchase, sell, exchange, transmit, and/or transact non-fungible tokens, crypto collectibles, blockchain-related items and products, and/or digital assets; Providing a website featuring on-line non-downloadable software that enables users to create, view, store, display, share, purchase, sell, exchange, transmit and//or transact non-fungible tokens, crypto collectibles, blockchain-related items and products, and/or digital assets; Providing an interactive website featuring technology that allows users to upload, download, share and sell custom and branded digital publications; Software as a service (SAAS) services, namely, hosting software for use by others for use in creating, viewing, storing, displaying, sharing, purchasing, selling, exchanging, transmitting and/or transacting non-fungible tokens, crypto collectibles, blockchain-related items and products, and/or digital assets; Design, maintenance, development and updating of computer software; Providing on-line non-downloadable software for generating cryptographic keys for receiving and spending cryptocurrency