From their distributor website (http://vosselections.com/Domains/1327.html, retrieved July 2017)
"The wines are all vegan."
Company email (May 2017)
[From the importer] "I received an email back from the winery this morning that does verify that all of their products are Vegan. They will have certification shortly."
Dibon Cava Brut Reserve
Vegan
This product is listed as vegan friendly.
What the company told us
Correspondence on record, with the date of each entry.