@Bastien-Nollet
I used vhd-cli info without the --chain option and it worked correctly. Thank you.
But vhd-cli info isn't the solution for me.
From what I've researched so far, it seems that to have cross-control of the backups, I'll have to use xo-fuse-vhd to mount the backup aliase.vhd and then run dd if=/mnt/vhd0 of=/dev/null bs=4M status=progress to verify the consistency of all the blocks in the backup.
The problem with this mechanism is that each time the verification is run, it checks the entire VDI and not just the incremental blocks of the aliase.vhd file, making it very resource-intensive for daily use.
Any suggestions would be welcome.