42 Providing online non-downloadable software for use in creating, displaying, performing, registering, purchasing, selling, transferring or storing music, artwork, animation, digital collectibles and digital assets authenticated by non-fungible tokens (NFTs); providing online non-downloadable computer software for creating, displaying, performing, purchasing, selling, transferring or storing digital music, artwork and animation authenticated by non-fungible tokens (NFTs); Providing user authentication services using blockchain-based software technology for cryptocurrency transactions; providing online non-downloadable software for product and document authentication and tracking, and brand monitoring and protection, to protect against counterfeiting, tampering, and diversion, and to ensure the integrity of genuine products and documents; Providing online non-downloadable interactive software applications for playing games; Custom design of digital clothing, articles of clothing, clothing-related accessories, footwear, headwear, eyewear, bags, digital animated and non-animated designs and characters, avatars, digital overlays and skins for online characters and avatars, art, and toys