42 Providing temporary use of on-line non-downloadable software and applications for enabling users to electronically create, exchange, store, send, receive, accept and transmit digital tokens based on the blockchain technology; Providing temporary use of on-line non-downloadable software and applications for use in accessing, reading, tracking, and using blockchain technology; 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 blockchain data; Platform as a service (PAAS) featuring computer software platforms for managing blockchain databases; Software as a service (SAAS) featuring computer software platforms for managing blockchain databases; Application service provider featuring application programming interface (API) software for accessing, reading, tracking, and using blockchain technology