Providing virtual computer systems and virtual computer environments through cloud computing; User authentication services using blockchain technology for cryptocurrency transactions, online software applications; Providing temporary use of on-line non-downloadable software and applications used to create, manage, analyze and verify data transactions utilizing blockchain-based platforms and cryptocurrency; electronic data storage, namely, providing a blockchain technology-based, distributed database ledger for the storage of public, private or encrypted data, transactions and information; developing and updating of computer software for use in managing cryptocurrency and block chain data