42 Providing temporary use of on-line non-downloadable software for creating, managing and verifying crypto-asset transactions; providing temporary use of on-line non-downloadable software for creating, managing and verifying transactions involving non-fungible tokens (NFTs); platform as a service (PAAS) featuring computer software platforms for creating and managing virtual currency, creating and managing contracts that are created, published and verified using computer protocols, and creating and managing financial instruments and financial transactions; electronic storage of cryptocurrency and crypto-asset coins and tokens for others, namely, electronic data storage; providing temporary use of on-line non-downloadable software that enables data communication by means of inter-blockchain and cross-blockchain technology; providing on-line non-downloadable computer software for enabling transactions in a blockchain-based, distributed computing environment, namely, providing private key management, signing of transactions, staking of tokens of value, creating and transferring non-fungible tokens (NFTs), creating smart contracts, creating sub-nets, accessing other cryptocurrency wallets, accessing digital asset custody platforms, accessing transfer and settlement platforms controlled by others and for communicating with other cryptocurrency and digital asset wallet users