Data Portability & Vendor Neutrality

How Vonch stores your data, what persists if you leave, and your rights under GDPR.

What Vonch stores and where

Data type	Where it lives	Who controls it
Review text	Decentralized storage (ComposeDB)	Buyer
Cryptographic proof	Polygon network	Public (immutable)
Order metadata	Supabase database	Merchant
Trust score	Supabase (derived)	Vonch
Buyer identity	Particle Network + Supabase	Buyer

What persists after a merchant leaves Vonch

Verified records written to the Polygon network are permanent and publicly verifiable — their existence does not depend on Vonch. If Vonch ceases to operate, every cryptographic proof remains readable by anyone who knows its unique identifier.

Review content held in decentralized storage is controlled exclusively by the buyer's identity key. Vonch holds no copy of that key and cannot modify or delete the content after it has been stored.

Data export

Merchants can export their complete review history as structured JSON at any time via the GraphQL API at POST /api/v1/graphql. There is no lock-in period and no export fee.

The following query retrieves all reviews for a seller in a single request:

{
  reviews(seller: "your-domain.com", first: 1000) {
    edges {
      node {
        rating
        reviewBody
        datePublished
        verificationStatus
      }
    }
  }
}

GDPR deletion

When a buyer submits a deletion request, Vonch applies the following steps:

Supabase — personal data fields (email, name) are nulled immediately.
Decentralized storage— the buyer's identity key is rotated, revoking future access to their encrypted content on the network.
Polygon network — on-chain account addresses are not modified. A pseudonymous identifier is not personal data under GDPR Recital 26 and is therefore outside the scope of erasure.

Vendor neutrality

The Vonch review schema is registered as a public good on the EAS network. Any developer — independent of Vonch — can issue verified records against this schema and query them using any compatible EAS client.

If Vonch introduces terms you disagree with, you can continue to read and verify the complete historical record without Vonch involvement.