Evidence row 577418

What was observed

{
  "count": 6,
  "tools": [
    {
      "description": "Check what Korean customs clearance requirements apply to a product by its 10-digit HS code. Goods that need an unmet approval are held or returned at Korean customs. Returns which statutes require clearance, which agencies can approve (often several, any one of which suffices), the certificate to obtain, and each requirement's condition quoted from the governing notice (Korean original, which is authoritative) — plus tariff rates for imports. Data: Korea Customs Service and the Ministry of Government Legislation. Fact lookup only — not a legal customs determination; whether a condition applies to your product is not decided here. Test code 8516710000 (coffee makers) is free.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "direction": {
            "description": "Default \"import\" (goods entering Korea)",
            "enum": [
              "import",
              "export"
            ],
            "type": "string"
          },
          "hs_code": {
            "description": "10-digit Korean HS (HSK) code, dots/hyphens allowed. 6 digits returns the 10-digit candidates.",
            "type": "string"
          }
        },
        "required": [
          "hs_code"
        ],
        "type": "object"
      },
      "name": "check_korea_import_requirements"
    },
    {
      "description": "Screen a product catalog for Korean import restrictions in one call. Submit up to 100 HS codes and get back what is restricted, with the statute, the approving agencies and the certificate required for each. Restricted codes come first, then codes that could not be checked, then clear ones. Invalid codes are listed in summary.invalid_hs and not counted. Use before opening a Korea shipping lane or listing a catalog for Korean buyers. Fact lookup only — not a legal customs determination.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "direction": {
            "description": "Default \"import\" (goods entering Korea)",
            "enum": [
              "import",
              "export"
            ],
            "type": "string"
          },
          "hs_codes": {
            "description": "1-100 Korean 10-digit HS (HSK) codes; dots/hyphens allowed",
            "items": {
              "type": "string"
            },
            "maxItems": 100,
            "minItems": 1,
            "type": "array"
          }
        },
        "required": [
          "hs_codes"
        ],
        "type": "object"
      },
      "name": "check_korea_import_requirements_batch"
    },
    {
      "description": "Screen a list of up to 100 Korean businesses in a single call by their 10-digit business registration numbers (사업자등록번호). Returns one entry per input number (order preserved) with registration status, tax type, and any public-procurement debarment (\"부정당업자 제재\") on record — a company can be perfectly active and still barred from public contracts. The summary counts how many are currently debarred. Use this for supplier, vendor or customer list screening instead of repeated single checks. Recently checked numbers may be answered from a cache up to 24 hours old (marked \"cache\": true). Sources: Korea National Tax Service, Public Procurement Service.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "business_numbers": {
            "description": "1-100 Korean business registration numbers; hyphens/spaces allowed",
            "items": {
              "type": "string"
            },
            "minItems": 1,
            "type": "array"
          }
        },
        "required": [
          "business_numbers"
        ],
        "type": "object"
      },
      "name": "check_korean_business_batch"
    },
    {
      "description": "Check the registration status of a Korean business by its 10-digit business registration number (사업자등록번호). Returns whether the business is active, suspended, or closed, plus tax type. Data source: Korea National Tax Service, real-time. The number 1248100998 (Samsung Electronics) is exempt from the daily free tier, so you can exercise this tool while building without spending your allowance.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "business_number": {
            "description": "10-digit Korean business registration number; hyphens/spaces allowed, e.g. \"123-45-67890\"",
            "type": "string"
          }
        },
        "required": [
          "business_number"
        ],
        "type": "object"
      },
      "name": "check_korean_business_status"
    },
    {
      "description": "Find a Korean company by name (English or Korean) when you do not know its 10-digit business registration number — the number every other tool here needs. Returns ranked candidates with a confidence score and discriminating evidence (registration status, tax type, region), because a name can match several distinct companies: \"Samsung Electronics\" matches four. Sources: DART (disclosure filers, English names) and the Public Procurement Service registry (small businesses).",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "limit": {
            "description": "Maximum candidates to return (default 5)",
            "maximum": 10,
            "minimum": 1,
            "type": "integer"
          },
          "name": {
            "description": "Company name in English or Korean, e.g. \"Samsung Electronics\" or \"삼성전자\"",
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "name"
        ],
        "type": "object"
      },
      "name": "find_korean_business"
    },
    {
      "description": "Verify that a Korean business registration number matches the provided representative name and opening date. Use for KYB / due-diligence before transacting with a Korean company. Returns match result plus current status.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "address": {
            "description": "Optional business address to include in the match (maps to NTS b_adr)",
            "type": "string"
          },
          "business_number": {
            "description": "10-digit Korean business registration number; hyphens/spaces allowed",
            "type": "string"
          },
          "opening_date": {
            "description": "Business opening date in YYYY-MM-DD format, e.g. \"2015-03-02\"",
            "type": "string"
          },
          "representative_name": {
            "description": "Representative (CEO) name as registered, e.g. \"홍길동\"",
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "business_number",
          "representative_name",
          "opening_date"
        ],
        "type": "object"
      },
      "name": "verify_korean_business"
    }
  ]
}

What the leaf hashes

{"body":"5941589337ae5f6bce34710457781248f77b1df4714e2434e793b4985a8cbd54","id":577418,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793142597772338,"prev":null,"subject":"3d9a0ab5-8bc2-4f44-88f5-d6bb2fe193d1","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0xe0f5c1cd72afd474ccceef20ceb96c27f185822badc0f9ab34412b497cf4e4da
2. 0x1f7632154245edee59d346175615d0490c41e970540342e724b1fb11f9362ac8
3. 0x7d6a3f9749cb87f230bc2cfeba68b183b80a8903a1324dd21f6f9993ef705c61
4. 0xd223fcd894f2bf03deb95c037c8126160b866b87d6528634840c1ca78e51bc71
5. 0x467bfe75024f6cf7e05dcd58c0ed9cfec27aed21573c9d50282c4f3dde91d8f1
6. 0xbb475be617550d5f7a596124650b7cb0bfc25739f5c1c40ab96fd5d43885c143
7. 0xc0f6bac1a2a3fecea10a814a2250a83a62f73686477226df72ae01fa9aebc417
8. 0x1a001fb46eda22b81c14f7fb8622471e48450666d48341476db62256997932d5
9. 0x37752257948519af6fbee080c2df6c7a89ded79e9cf6aa9d7d23eef6f61f504b
10. 0x7500c5f371023b62f9e018220c253e4b21db0728dc50f6072786b4619de381be
11. 0xd0d909352f9e85f35de7c6378041c31c709c848a1c4fc17002cbf5d0b312d061
12. 0xa7bf7b9cc7b39dca708cf0cc5d77059435823b975a1b485d07bbb69188527cb0
13. 0x979156f4f0a1ab811055c0a4d2b45bfa74d4bef619c176540454ee8d15e5bebc
14. 0xf72dee7a0c7534cb19ede4959b957b00c0a8285c36ad49dd2ce1c1092bf60d93
15. 0x24e3e2bb8ee1e8d20756de35f0e0c4ec8eb1f193bd2cf3f077ee1f92f211c34d
16. 0x8745bd887f5ce9f7a49558fd2b04cdcd97a05ea9f8a23f62d0e80cb13d328b0f
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4