Providing on-line non-downloadable computer software for facilitation of cryptocurrency transactions and exchanges; Software as a Service services (SAAS) for the facilitation of cryptocurrency transactions; Application service provider featuring application programming interface (API) software blockchain based platforms; Software as a service (SAAS) services featuring software for scaling, managing, and validating blockchain transactions; Software as a service (SAAS) services featuring computer software for providing distributed ledgers, distributed systems, and trust systems; Providing use of on-line non-downloadable software for providing distributed ledgers, distributed systems, and trust systems On-line non-downloadable software for facilitating a cryptocurrency transactions, namely, digital tokens based on blockchain technology; 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