You could use the Luhn algorithm or something similar to add a check digit to the end, so for instance, generate a standard uuid, remove the last character, pas

You could use the Luhn algorithm or something similar to add a check digit to the end, so for instance, generate a standard uuid, remove the last character, pass the remaining characters through the Luhn function and then use the result as the final replacement character for the UUID. It's obviously not cryptographically secure, as in someone else could use the same algorithm to generate UUIDs that your system recognises, but could be a quick way of doing a verification before you hit the DB.