Providing online non-downloadable software for blockchain development and implementation, secure data transaction management, and decentralized application (dApp) creation; providing a web-based platform for the deployment and management of blockchain protocols and distributed ledgers; software as a service (SaaS) featuring software for the development, execution, and management of blockchain applications and secure data transactions; software development services for blockchain technology and decentralized applications (dApps); providing temporary use of online non-downloadable software for developing, testing, and integrating blockchain software applications; 009. Computer and mobile application software for blockchain-based platforms, namely, software for managing cryptocurrency transactions, and blockchain-based identity verification; downloadable computer software for encryption and secure data transactions within blockchain environments; downloadable software for developing and implementing blockchain protocols and decentralized applications (dApps); downloadable software for the representation and management of data in secure transactions and distributed ledgers; downloadable computer software for the development, testing, and integration of blockchain applications on shared and distributed ledgers