At this level
app.certified.signature ยท 2- app.certified.signature.defs defs Common type definitions for cryptographic signatures attached to records, per the ATProtocol Attestation Specification. Each signature's `$type` says what it attests.
- app.certified.signature.proof record A remote attestation proof record holding the CID of attested content. Lives in the attestor's repository and is referenced from the attested record's `signatures` array via `com.atproto.repo.strongRef`. Conforms to the ATProtocol Attestation Specification.