If you obtained iosxrvk9demo613qcow2 from a non-Cisco source:
The string "iosxrvk9demo613qcow2 updated" appears to be a random combination of characters, but it has been making waves in various online communities and forums. As a curious observer, I decided to dig deeper into this enigmatic phrase, and what I found was a rabbit hole of intriguing information.
The file is a virtual disk image for the Cisco IOS XRv Go to product viewer dialog for this item.