The marketplace for the most part does this for you. The artist directs buyers to the marketplace page for their project and the marketplace pulls information d

The marketplace for the most part does this for you. The artist directs buyers to the marketplace page for their project and the marketplace pulls information directly from the blockchain. If you want additional security you can manually lookup the history of a project on etherscan. There are scammers that make copy-cat projects but it is usually easy to steer clear of them by getting contract address/marketplace info from the artist on twitter or discord.