How do I verify ROAS immutably?

ROAS is extracted from a trusted capture, embedded in a canonical JSON payload, and hashed with SHA-256. The hash is published; any change to pixels or numbers invalidates the hash and the public verification page shows the failure.

What makes this a notarial protocol?

The system uses a single canonical serialization, a deterministic hash, and a published audit URL. Third parties can recompute or compare without trusting a private database narrative.

Verification · Cryptography

Digital notary for every certified artifact

Each capture, KPI, and copy revision is hashed. Any post-hoc edit breaks the chain—visible in the console and on the public certificate.

sha256 · e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

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Protocol

Before the “Verified Success” badge ships, the backend computes SHA-256 over the canonical payload (normalized image bytes + numeric fields + org_id + UTC timestamp).

Hashes live in PostgreSQL; key rotations and migrations are logged so diligence can reconstruct history.

terminal · canonical_record.json

{
  "v": 1,
  "org": "org_…",
  "kpi": { "roas": 4.62 },
  "sha256": "e3b0c442…"
}

Illustrative—production fields include nonces and schema version.

Guarantees

▸Integrity: altering one pixel or digit invalidates the published hash.
▸Non-repudiation: the issuing organization is bound to the artifact in the public directory.

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