How is ownership of an NFT verified and tracked on a blockchain?

Ownership of an NFT is verified and tracked on a blockchain through the use of a unique digital signature. Each NFT is represented by a unique code, or token, that is stored on a blockchain. When someone buys an NFT, the transaction is recorded on the blockchain, and ownership is transferred to the buyer's wallet address. The blockchain serves as a public ledger, allowing anyone to view the transaction history of an NFT, including previous owners and sale prices. This makes it easy to verify ownership and the authenticity of an NFT. The use of blockchain technology ensures that the ownership of an NFT is transparent, secure, and decentralized.