A non-fungible token (NFT) is a unit of data stored on a digital ledger, called a blockchain, that certifies any digital file to be unique. An NFT functions like a cryptographic token, but unlike cryptocurrencies such as Bitcoin, are not mutually interchangeable, in other words, not fungible. NFTs are created when blockchains string records of cryptographic hash, a set of characters that verifies a set of data to be unique, onto previous records therefore creating a chain of identifiable data blocks. This cryptographic transaction process ensures the authentication of each digital file by providing a digital signature that is used to track NFT ownership. However, data links that point to details like where the art is stored can die. Also, ownership of an NFT does not inherently grant copyright to whatever digital asset the token represents. While someone may sell an NFT representing their work, the buyer will not necessarily receive copyright privileges when ownership of the NFT is changed and so the original owner is allowed to create more NFTs of the same work. In that sense, an NFT is merely a proof of ownership that is separate from a copyright.