Is there a website that generates GUID or UUID but also stores the result that I can access?

I want to generate some GUID numbers using an online website but also have it stored reliably, where I can say, a particular GUID was generated at a certain time, as can be inspected with a unique link, so there is no tampering of the data.

I have seen some random number generators online do this, as a way for 2 parties to inspect the values used as a seed.

Is there such a service I can use?