verify derived

{
  "input": {
    "body": {
      "fields": {
        "vendor": "Sample Shoji K.K.",
        "tax_jpy": "100",
        "total_jpy": "1100",
        "invoice_no": "SAMPLE-001",
        "issue_date": "2026-09-05"
      }
    },
    "type": "http",
    "method": "POST",
    "bodyType": "json"
  },
  "output": {
    "type": "json",
    "example": {
      "ok": true,
      "note": "SAMPLE RESPONSE (recorded from a real production run). Served free at /samples/{product} so you can see the exact response shape before paying. No payment was taken.",
      "checks": [
        {
          "pass": true,
          "check": "tax_rate_10pct",
          "detail": "net=100000 tax=10000 expected=10000"
        },
        {
          "pass": true,
          "check": "invoice_reg_no_checkdigit",
          "detail": "reg=T1180301018771 cd=1 expected=1"
        }
      ],
      "sample": true,
      "verified": true,
      "corp_registry": {
        "name": "トヨタ自動車株式会社",
        "note": "existence of the underlying corporate number in the Japan NTA corporate-number registry; NOT the qualified-invoice-issuer registration status. Sole proprietors are not in this registry, so not_found does not mean the number is invalid.",
        "source": "Japan NTA corporate number registry (houjin-bangou.nta.go.jp)",
        "status": "found",
        "corporate_number": "1180301018771",
        "address_pref_city": "愛知県豊田市",
        "vendor_name_match": "exact"
      },
      "accounting_json": {
        "tax": 10000,
        "total": 110000,
        "reg_no": "T1180301018771",
        "vendor": "トヨタ自動車株式会社",
        "currency": "JPY",
        "customer": null,
        "due_date": null,
        "subtotal": 100000,
        "invoice_no": null,
        "issue_date": null
      }
    },
    "description": "JSON: per-check pass/fail with reasons"
  }
}