A non-fungible token (NFT) is a distinct digital asset recorded on a blockchain that verifies ownership and authenticity of a specific item through verifiable cryptographic data.
Evaluating and Managing NFTs
Working with non-fungible tokens requires understanding the specific technical standards and custody workflows that govern their behavior on public ledgers.
- Verify the smart contract: Check the contract address and token ID on a blockchain explorer to confirm collection authenticity before acquiring an asset.
- Inspect metadata storage: Determine whether the associated media files and attributes reside on decentralized networks like IPFS or on centralized servers that carry availability risks.
- Review token standards: Identify whether the asset uses standards such as ERC-721 for single unique items or ERC-1155 for semi-fungible batch items.
- Secure private keys: Store tokens in non-custodial hardware wallets to reduce exposure to phishing exploits or malicious marketplace approvals.
Mechanics and Fungibility Distinctions
The defining technical property of an NFT is non-fungibility, meaning that each unit possesses individual identifiers that prevent it from being swapped on an equivalent one-to-one basis with another token. In contrast, fungible tokens like Bitcoin or standard ERC-20 utility tokens are mutually interchangeable and maintain identical market values per unit across a ledger.
When an NFT smart contract mints a new token, it assigns ownership to a specific wallet address alongside a metadata pointer known as a token URI. This metadata defines the unique attributes, provenance history, and licensing terms associated with the token. While secondary marketplaces facilitate trading, the underlying blockchain ledger maintains a verifiable record of transfer history without relying on a centralized intermediary.