Artifact Signing email verification link returns “The request is blocked”

I am completing Public organization identity validation for Microsoft Artifact Signing.

The verification email arrived successfully, but clicking “Verify email address” opens the Microsoft 3PC vetting endpoint and displays:

“The request is blocked.”

I have tried:
- Chrome Incognito
- Edge/InPrivate
- Signing out of other Microsoft accounts
- VPN and proxy disabled
- A different network
- A mobile/cellular connection

The email link is less than seven days old. The identity validation currently remains In Progress.

Could the Artifact Signing team confirm whether the email attestation was recorded or help unblock the current verification request?

I can provide the identity-validation ID and Microsoft correlation/reference ID privately to a Microsoft moderator.