An NFT's unique digital signature, which is created using a cryptographic hashing function, verifies its authenticity and ownership in the following ways:

Authenticity: Each NFT has a unique digital signature that is created using a cryptographic hashing function. This signature is added to the blockchain, which serves as a decentralized ledger of all NFT transactions. Once an NFT is added to the blockchain, its signature cannot be altered, ensuring that it is authentic and original.

Ownership: The blockchain also serves as a record of ownership for each NFT. When an NFT is created, it is assigned to a specific wallet address, and ownership of the NFT is transferred by transferring ownership of the wallet address. This means that whoever holds the private key associated with the wallet address is the owner of the NFT. The digital signature of the NFT serves as proof of ownership, as it is recorded on the blockchain and cannot be modified.

In summary, the unique digital signature of an NFT is used to verify its authenticity and ownership by providing a decentralized and immutable record of its creation, ownership, and transaction history on the blockchain.
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