Yes, it is available in the FCI but the Slovakian Club decided not to accept registered dogs and doesn´t register as far as I know.
But it can´t be prevented that other countries register them and that was how the Mutaras got into breeding.
http://www.wolfdog.org/deu/dbase/d8668.html
It would make sense in the case of dogs like Amber to get a paternal DNA for proof and than at least give informations in the registry-papers but the parents and other ancestors don´t show up in the papers. So all information is lost.
I don´t think registration is bad in general if it is handled with paternal proof or like in the case of the Picard helps to get more dogs into the breeding gene pool but it gets a big problem with mixes or parents that didn´t fullfill the the breeding rules by failing the health tests that are required.