In Japan, a Hanko is a personal seal, used in place of a signature to authenticate documents and transactions. Each mark is physical, unique, and irreplaceable.

Every Dutchtide original embeds a cryptographic NFC chip directly in the physical artwork. Tapping the chip with your phone generates a cryptographic signature, proof that you are physically holding the real work.

That signature is your certificate of authenticity. Not a scan, not a receipt, the chip in the artwork itself, signing to the blockchain.