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 an ARX HaLo 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.