Providing on-line non-downloadable computer software for use in building, developing, executing, and running other software and applications on the blockchain; Providing on-line non-downloadable computer software development tools for the creation of blockchain applications; Providing on-line non-downloadable computer software development tools for building and implementing blockchain based platforms; Application service provider (ASP) featuring application programming interface (API) software for developing and implementing blockchain based platforms; providing temporary use of non-downloadable web-based decentralized applications (DApps) for creating and executing blockchain contracts, cloud storage of data, and cryptocurrency trading; providing online non-downloadable software providing a blockchain protocol that enables scaling of decentralized applications (DApps); Design, development, and implementation of software for building, developing, executing, and running other software and applications on distributed computing platforms; design, development, and implementation of software for building, developing, executing, and running blockchain software; Providing on-line non-downloadable computer applications and platforms to facilitate the use of blockchain or distributed ledgers to execute, read, and record financial transactions, information storage, and data collection; Platform as a service (PAAS), featuring computer software platforms for launching and scaling applications; Software as a service (SAAS) services featuring software for scaling, managing, and validating blockchain transactions; Providing on-line non-downloadable software enabling user authentication for commercial transactions; Providing on-line non-downloadable computer software for use in developing scalable, modular, interoperable blockchain applications for single and multiple blockchains; Blockchain as a service (BAAS) featuring computer software for building, developing, and executing blockchain applications; Blockchain as a service (BAAS) featuring computer software platforms for launching and scaling applications; Blockchain as a service (BAAS) for use in developing scalable, modular, interoperable blockchain applications for single and multiple blockchains; Blockchain as a service (BAAS) featuring software for managing and validating blockchain transactions