We don’t offer free proofs.
Certainly not on Art. That is way to subjective and usually results in more than one proof.
I use an old Epson Artisan to do check prints. In photo mode on glossy photo paper, the color is fairly close approximation. But I mainly use it for rez checks. If something looks iffy, I do a cheap print first before committing to time and materials on the big machines.
The Artisan is almost a decade out of production. The EcoTank models are the latest in that line of printers. Trouble with EcoTanks is you have to use them. If they sit, the lines clog.