Authentication of data in the field of cryptocurrency transactions using blockchain technology; Cryptocurrency staking services in the nature of providing online non-downloadable computer software platforms for validating cryptocurrency transaction data on blockchains; Providing temporary use of on-line non-downloadable software and applications for cryptocurrency transactions; Providing user authentication services using blockchain-based software technology for cryptocurrency transactions; Software as a service (SAAS) services featuring software for cryptocurrency transactions; User authentication services using blockchain technology for cryptocurrency transactions, online software applications