The potential VMs Artist does not need to be the owner of the comparative illustrated manuscripts. All that is needed is access to the manuscripts, which means access to the libraries. BNF Fr. 565 started out in the library of Jean, Duke of Berry (d. 1416, Paris). It probably stayed in the family for a while after that. The 'Apocalypse of S. Jean' (1313) came to the Library of Philip the Good, Duke of Burgundy (ruled 1419-1467).
In the history of the Hundred Years' War, Anglo-Burgundian forces held Paris from 1420 to 1435. An educated person, a cleric or some such, coul easily have had access to both libraries any time during this period - or subsequently. The VMs could have been started in one decade, revised over the years, and finished in another. There may be significant variables between various scenarios, but can they be distinguished?
In the history of the Hundred Years' War, Anglo-Burgundian forces held Paris from 1420 to 1435. An educated person, a cleric or some such, coul easily have had access to both libraries any time during this period - or subsequently. The VMs could have been started in one decade, revised over the years, and finished in another. There may be significant variables between various scenarios, but can they be distinguished?