Hello,
To launch a platform for buy and sell NTFs, what is needed? For example, someone puts a painting on your website to sell its NTF, then how the NTF of that painting reserved? How you can sure he\she not placed it on another NTF site?
Thank you.
To launch a platform NFT, you must create smart contract to blockchain.
The weakness of NFT is that it can be duplicated to other markets.