{
  "id": "v05-att-derivation-ws-target",
  "chapter": "02",
  "title": "att_ id derives from the public signer payload plus the lowercased email as email_hash_input",
  "check": "receipt_id",
  "input": {
    "kind": "att",
    "attestation": {
      "ws_receipt_id": "ws_abc123def456",
      "signer_name": "Sarah Kim",
      "signer_role": "Lead robotics coach",
      "signer_organization": "Lincoln High FRC Team 4012",
      "statement": "Maya was our drive team lead for the 2026 season.",
      "signer_email": "S.Kim@LincolnHS.org"
    }
  },
  "expect": {
    "verdict": "pass",
    "id": "att_5d9b296a66cb",
    "sha256": "5d9b296a66cbda89cdd4e5083e788a0a41461a349697d11fc0429651f7e37fa5"
  }
}