You need a Ciphers.me account to add a crypto stamp to your collection.
Create your free account here.
When you registered your Ciphers.me account you can simply scan the crypto stamp booklet QR-code with the camera on your smartphone or enter the first PublicID code manually.
To add the stamp to your collection you enter the second Claim code.
Your stamp is now added to your personal collection and you can mint the NFT to your Web3 wallet.