NFT (from the English Non-Fungible Token) is a unique token that represents a digital asset in blockchain chains (more about this term below). Simply put, an NFT is proof of ownership of some original digital object, such as an image, video, audio or, for example, a game item. That is, an NFT can be considered as a virtual certificate that guarantees its owner the copyright to a specific digital object created or purchased by him (yes, NFTs are sold and bought). Blockchain is a distributed database that uses cryptography to ensure the security and integrity of data. A blockchain consists of a set of blocks, each of which contains some information, for example, about transactions in a cryptocurrency system. Each block contains information about the previous block (hash), which ensures the connection between blocks and creates their chain. This is where the name “blockchain” comes from, because the English word blockchain just means “chain of blocks.” The main advantage of blockchain is that it is a decentralized system, that is, it does not have a single control center. This means that data is stored and processed across multiple nodes across the network, making it more secure from hacking and fraud. In addition, blockchain can reduce transaction processing costs and speed up the data transfer process, which makes it attractive for use in a wide variety of technologies.