constructor(address _cidNFT, string memory _subprotocolName) ERC721("Profile Picture", "PFP") {
    cidNFT = ICidNFT(_cidNFT);
    subprotocolName = _subprotocolName;
uint256 cidNFTID = cidNFT.getPrimaryCIDNFT(subprotocolName, _pfpID);
IAddressRegistry addressRegistry = cidNFT.addressRegistry();
if (cidNFTID == 0 || addressRegistry.getAddress(cidNFTID) != ERC721(nftContract).ownerOf(nftID)) {
    nftContract = address(0);
    nftID = 0; // Strictly not needed because nftContract has to be always checked, but reset nevertheless to 0
}
