Authenticating works of art; Authentication, issuance and validation of digital certificates; Computer services, namely, electronic digitizing of artwork; Electronic storage of cryptocurrency for others; Platform as a service (PAAS) featuring computer software platforms for the buying and trading of art and collectibles; Providing on-line non-downloadable computer software for use as a cryptocurrency wallet; Providing on-line non-downloadable software for generating cryptographic keys for receiving and spending cryptocurrency; Providing a website featuring technology that enables users to generate printable cryptocurrency wallets; Providing a website featuring a searchable on-line quality evaluation of rarities for the purpose of measuring the scarcity of rare collectible objects; Providing user authentication services using blockchain-based software technology for cryptocurrency transactions