§ 04 Authentication provenance COA · Verisart · C2PA

Editions & certificates.

Three concurrent layers, travelling with every copy. Blockchain · archive · paper.

Every piece arrives with all three authentications at once. The print leaves Frechen unsigned — the hand-signed signature reaches the collector on the COA card with the shipment.

§ 04.1 · Three layers The three concurrent authentications.

  1. i

    Verisart · blockchain

    Authorship record inscribed on blockchain with Bitcoin OpenTimestamps. Ownership transferable on the same chain, without intermediaries.

    Chain Bitcoin OpenTimestamps
  2. ii

    C2PA · file manifest

    Authorship, process and chain-of-custody metadata embedded in the print file, readable by any C2PA-compatible viewer. Compliant with EU AI Act art. 50.

    Standard Adobe CAI TIFF · embedded
  3. iii

    COA · signed card

    Hahnemühle Photo Rag textured cardstock, handwritten numbering and a QR code that resolves verification. The signature lives on the card, the print stays clean.

    Support Hahnemühle A6 Hand-signed

Once the edition is complete, it is never produced again · neither in this size nor any other

For the current edition (Drop 01 · Otto), see the editions catalogue.