A novel method and instruction set for storing and trading Non-Fungible Tokens (NFTs), on Bitcoin blockchain. As proof of NFT ownership, proposed methods allow a user to perform the following operations with an NFT: (1) store NFT token on Bitcoin blockchain; (2) securely associate NFT data unit with digital assets (photos, video, audio, digital documents, etc.); (3) grouping many NFT tokens together to a collection with a single unique identifier; (4) safely sell and buy an NFT using Bitcoin ecosystem. These actions and validation of the transactions are performed using Bitcoin transactions.