{
  "id": "v11-family-sig-context-stripped",
  "chapter": "04",
  "title": "a signature over the raw leaf without the context prefix MUST NOT verify (domain separation is load-bearing)",
  "check": "family_sig",
  "input": {
    "leaf_payload": "{\"issued_at\":\"2026-07-17T00:00:00.000Z\",\"prefix\":\"ws\",\"receipt_id\":\"ws_abcabcabcabc\",\"sha256\":\"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\"}",
    "sig": "z7bFQMjtMUNkVRLvh9kycX8YttmVgBSXXDFZwXEAJ1DCHLCr8paCVGBoBFFHWe6Pj4ue7jWpdjyvit691f67iM96",
    "public_jwk": {
      "kty": "OKP",
      "crv": "Ed25519",
      "x": "3u49EWAYq9eZLWhvGWPCjDq-bhCwjRqsH6ye8NPPaPk"
    },
    "key_id": "did:key:z6MkuTVFfuQ4oxTE7eXm6ovFx3mWwKhtn58VGUvshhXQGnTz"
  },
  "expect": {
    "verdict": "fail"
  }
}