Ownership of NFTs is guaranteed through the use of blockchain technology, which provides a transparent and decentralized ledger of ownership. Each NFT is uniquely coded and recorded on the blockchain, and ownership is verified by the owner’s public key. This makes it virtually impossible for anyone to steal or replicate the NFT, as the blockchain provides an immutable and tamper-proof record of ownership. Additionally, most NFT platforms provide a marketplace that allows owners to transfer their NFTs to other parties, with the blockchain serving as a trusted intermediary to ensure secure and verifiable transactions.