A .ddna envelope carries its own proof. We check the Ed25519 signature over the record and whether it appears in the DeepaData registry — anyone holding the envelope can do the same. Nothing you paste is stored.
No envelope to hand? Inspect a live certificate
Records also check out offline: the open-source ddna-tools CLI verifies envelopes without contacting DeepaData, and since v0.4.3 its validate command runs the same seal-grade schema checks used at sealing.