Downloadable computer programs for creating and trading digital collectibles using blockchain-based software technology and smart contracts; downloadable digital media, namely, digital collectibles in the nature of downloadable multimedia files containing artwork in the field of music and audiovisual entertainment authenticated by non-fungible tokens (NFTs) and created with blockchain-based software technology and smart contracts; downloadable computer software for managing digital collectible services, a market for transactions, and a registry using blockchain- based software technology and smart contracts for digital collectibles; Downloadable computer software for use in the safeguarding of digital files, including audio, video, text, binary, still images, graphics and multimedia files; Downloadable computer software enabling the creation, sale and trading of digital audio and video files, digital collectibles, and sports trading cards for use on computers, smart phones, tablets and digital personal assistants; Digital photo frames for displaying digital pictures, video, gifs, art, non-fungible tokens (NFTs), and other digital collectibles; downloadable entertainment software for collection, distribution, and use of digital collectibles which have a permanent, identifiable record on the blockchain; downloadable mobile application for providing access to online digital collectibles and application tokens for use in online virtual worlds; all of the foregoing goods limited to non-fungible tokens (NFTs) and digital collectables created with blockchain-based software technology and smart contracts