Darkblock has launched a web and tv-app to enable creators to upgrade existing NFTs to include an exclusive piece of content reserved for the NFT owner. The decentralized protocol layer works by attaching an encrypted asset to an existing NFT. The NFT displayed on a marketplace acts as a “preview” to the underlying asset (jpg, mp4, gif, etc.) protected in a Darkblock. Only the true owner of the NFT (or owners, if fractionalized), is able to decrypt and view the original NFT.