How it works

One diagram, three actors, one loop.

    BRAND                  PRODUCT               BUYER / RETAILER
  (issuer)             (its credential)          (verifier)
     |                      |                          |
     | -- delivers -->      |                          |
     |  authenticity VC     |                          |
     |                      | <-- asks for --           |
     |                      |   proof of origin         |
     |                      | -- presents -->           |
     |                      |   authenticity VC         |
     |                      |                     verifies (ok)
  

• A provenance credential is signed JSON that travels with the product.
• Delivery (brand → product/owner) and presentation (owner → buyer) are the same simple exchange loop: POST, read what the server wants, POST back.
• The credential proves origin without exposing a central database — each check is cryptographic, not a lookup someone can tamper with.

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