42 Computer programming; Providing temporary use of non-downloadable web-based decentralized applications (DApps) for digital assets trading; Software as a service (SAAS) services featuring software for use in displaying, monetizing, buying, selling, trading, clearing, confirming, and authenticating digitized assets and non-fungible tokens; trading artwork authenticated by non-fungible tokens (NFTs) using blockchain-based smart contracts; Software as a service (SAAS) services featuring software for trading artwork authenticated by non-fungible tokens (NFTs) using blockchain-based smart contracts; Software design and development