Check a known EU VAT ID and/or Peppol participant using separate tax-validity, entity-match, and discoverability evidence. VIES is never used for name search and upstream responses are not resold. / 既知のEU VAT IDまたはPeppol参加者を税番号有効性・法人一致・到達性に分けて確認します。VIESは名称検索に使わず、元データは再販しません。