Computer software development in the field of blockchain and distributed systems software; software development and product development consulting in the field of user interface and user experience; computer software consulting services in the field of design, development, implementation and use of computer software systems for others; providing online non-downloadable cloud-based software for computational integrity and blockchain technology, namely, providing online non-downloadable cloud-based software for verifying payment transactions, verifying updates to databases, transacting over blockchains, conducting blockchain transactions and verifying state changes in applications running over blockchains; research and development of computer software and hardware; computer software consultancy in the field of software for computational integrity and blockchain technology; software as a service (SAAS) services featuring software for computational integrity and blockchain technology for verifying payment transactions, verifying updates to databases, transacting over blockchains, conducting blockchain transactions and verifying state changes in applications running over blockchains; web application development in the nature of development of computer software in the fields of blockchain technology and blockchain transactions and programming of computer software for others; mobile hybrid computer software application development and programming for others; web-based server management for others; website development for others; development and maintenance of websites for third parties; computer software programming services for others to provide content programming on websites; technical consulting services in the field of technology development for mobile applications; integration of computer systems and networks; technology solutions and technology services to businesses, namely, computer consulting and advisory services in the field of computer systems integration, development of computer software and remote administration and management of in-house and hosted datacenter devices, databases and software applications; computer software development in the field of mobile applications