Provision of non-downloadable software to enable data authentication via blockchain; Non-downloadable software to enable asset streaming for the real-time transfer of digital assets or tokens; Providing access to computer databases and cryptographic ledgers; Design, development, and implementation of software in the field of blockchain technology; Data storage via blockchain; Providing temporary use of online non-downloadable computer software for use as a cryptocurrency wallet; Certification of data via blockchain; Blockchain as a service [BaaS] for use in securing data with cryptographic information; User authentication services using blockchain technology; Providing online non-downloadable blockchain software to enable cross-chain interaction; Computer programming of smart contracts on a blockchain; Providing online non-downloadable software for enabling applications to communicate across blockchain ecosystems; Providing online non-downloadable software for blockchain-based platforms, namely, software for distributed applications and software using a consensus engine incorporating blockchain technology for securing data with cryptographic information; Platform as a Service (PaaS) services for use in connecting blockchain ecosystems; Providing online non-downloadable software for generating cryptographic keys for receiving and spending cryptocurrency; Providing online non-downloadable software to facilitate the use of a digital currency and digital tokens by members of an online community; Providing online non-downloadable software for use in the security of cross-chain transfers; Providing online non-downloadable software for use in blockchain-based inventory management; Providing online non-downloadable software to enable real-time data streaming across different blockchain networks; Providing online non-downloadable cryptographic protocols for operating and building applications