Platform as a service [PaaS] relating to blockchain-based non-fungible tokens [NFTs]; design and development of computer software for issuing and selling blockchain-based non-fungible tokens [NFTs]; hosting platforms on the internet for issuing, trading, selling, managing and verifying blockchain-based non-fungible tokens; hosting platforms for issuing, trading, selling, managing and verifying digital certificates for ownership and use rights of blockchain-based digital content; development of user interface software for blockchain-based non-fungible tokens [NFTs]; updating and maintenance of computer software for issuing and selling blockchain-based non-fungible tokens [NFTs]; software programming for blockchain platforms; development of virtual reality software; technological services in the field of digital asset management; hosting platforms on the internet for delivery of multimedia content; programming of software for e-commerce platforms; electronic data storage services; development, updating and maintenance of software and database systems; on-line data storage; provision of security services for computer networks, computer access and computerised transactions; design and development of application software for use in metaverse environments; platform as a service [PaaS]; data encryption and decoding services; development of computer software for security management; development of computer software for big data processing