{
  "PHOENIX": {
    "alg": "ML-DSA-65",
    "fingerprint": "sha256:679290db44537124"
  },
  "INGV": {
    "alg": "ML-DSA-65",
    "fingerprint": "sha256:b21e60b02d066da4"
  },
  "OLDGABE": {
    "alg": "ML-DSA-65",
    "fingerprint": "sha256:7ec14b2bd28e79e8"
  },
  "_isolation": "cross-verification matrix is diagonal: each product verifies ONLY under its own key"
}