Verify a document
Confirm a UHDU Digital Passport or Certificate of Incorporation using the number and verification code printed on it, or by scanning its QR code.
The Union never lists members or companies publicly. A document can only be confirmed by someone who holds its number and verification code.
Offline verification
Every Digital Passport and Certificate of Incorporation carries an Ed25519 digital signature. The Union's public key is published at /.well-known/uhdu-signing-key.