Hello @PatrickK-4189 ,
I understand that you want to add a custom /48 IPv6 Prefix in Azure but you were not able to validate the Prefix in Azure portal and getting the following error message: "CustomerSignatureNotVerified".
The following may be the causes for CustomerSignatureNotVerified Error:
- If you have whitespace or carriage returns in the SignedMessage that you used to sign with your private key. Please verify this is not the case.
- If you uploaded the wrong public key to your RIR or the key has whitespace in it.
You already checked both possible problems multiple times and you could verify your signed message by using the certificate from the whois record and the data submitted in Azure Portal. Openssl also reports "Verified OK".
So, I requested you to send us an email for further troubleshooting. But you tried again and it worked this time. Even though you didn't change anything, the same commands worked and your issue is now resolved.
It could have been a transient issue which was resolved automatically after some time.
Kindly let us know if you need further assistance on this issue.
Please "Accept the answer" if the information helped you. This will help us and others in the community as well.