I think it's safe to assume that you would only get the check mark if your NFT is minted from the original contract. This is an issue for brand new collections

I think it's safe to assume that you would only get the check mark if your NFT is minted from the original contract. This is an issue for brand new collections (and you see this happen on OpenSea where people fork new a new popular collection). But it's really easy to just whitelist the original BAYC contract address