They are part of The Trust Project https://elpais.com/estaticos/que-es-the-trust-project/ https://elpais.com/estaticos/que-es-the-trust-project/ I am sure tha

They are part of The Trust Project https://elpais.com/estaticos/que-es-the-trust-project/ https://elpais.com/estaticos/que-es-the-trust-project/ I am sure that in their opinion this is more than enough to prove that they are serious and trustworthy.