NFTs (non-fungible tokens) are files like images, animated gifs, videos or 3D models, that are cryptographically signed and stored on the blockchain. Each NFT has unique identifiers to distinguish it from other NFTs.

If you are certifying an NFT on Verisart you will need to provide 3 pieces of information to enable us to verify it:

  1. Contract Address

  2. Token ID

  3. Owner Address

You must be the owner of the NFT and have connected your wallet to your Verisart account.


Minting Platform

The minting platform is where you created your NFT, for example, SuperRare, Rarible, OpenSea or another marketplace. We currently support several minting platforms on the Ethereum blockchain. Select the correct option from the dropdown list. If your minting platform isn't listed, drop us a message and we'll try to add it.


On-chain Information

What is on-chain information?

On-chain information identifies the NFT on the blockchain. There are 3 pieces of information you'll need:

  1. Contract Address: This refers to the address location of the smart contract that manages the logic for the token.

  2. Token ID: A unique instandce of the smart contract

  3. Owner Address: The wallet address of the owner of the NFT. To certify an NFT on Verisart, you must be the owner of the NFT and have connected your wallet to your Verisart account.


Where can I find on-chain information?

Look up your NFT listing on OpenSea to get the required on-chain information.

Contract Address and Token ID

On the OpenSea listing, you will find the Contract Address and Token ID under "Chain Info"

If the full information is not being displayed and you see an ellipsis, you can find the contract address and token ID by looking at the URL.

  • The Contract Address is the first string of letters and numbers that comes after "https://opensea.io/assets/"

  • After the Contract Address, you'll see a ' /'. The string of letters and numbers that comes after that is the Token ID

Finding the owner address

To find the owner address click the name of the user who owns the work

Copy the string of letters and numbers under the name.

Remember: You can only certify NFTs you currently own and which are linked to the wallet linked to your Verisart account.

Did this answer your question?