Evidence row 263996

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "List the tools of this server with prices, data sources, licensing, daily limits and data freshness.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "catalog"
    },
    {
      "description": "Re-fetch the stored result of a settled paid call by its receipt_id, for when the response was lost after payment. Free. Unknown or unsettled receipt ids return RECEIPT_NOT_FOUND. Results are kept for 90 days after settlement.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "receipt_id": {
            "description": "The receipt_id returned with a paid result (\"rcpt_\" + 64 hex characters).",
            "maxLength": 80,
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "receipt_id"
        ],
        "type": "object"
      },
      "name": "get_receipt"
    },
    {
      "description": "Which organic JAS listings were added to, changed in, dropped from or returned to MAFF's official lists since a date? From this service's own record of list versions (MAFF keeps no old files). Each change has the listing id, observed_at, last_seen_at, changed fields and before/after; personal-looking names are withheld and the reason for a drop is not published or inferred. History starts at tracking_since. Free window: last 30 days.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "change_type": {
            "description": "Optional filter: added, modified, dropped_from_list or reappeared",
            "enum": [
              "added",
              "modified",
              "dropped_from_list",
              "reappeared"
            ],
            "type": "string"
          },
          "country": {
            "description": "Optional filter: country code (CN), English name or Japanese name. JP = the domestic list",
            "maxLength": 60,
            "type": "string"
          },
          "limit": {
            "description": "Maximum number of changes, 1-500 (default 100)",
            "maximum": 500,
            "minimum": 1,
            "type": "integer"
          },
          "since": {
            "description": "ISO 8601 date or date-time with time zone, e.g. 2026-10-01 or 2026-10-01T00:00:00Z",
            "maxLength": 40,
            "type": "string"
          }
        },
        "required": [
          "since"
        ],
        "type": "object"
      },
      "name": "organic_jas_changes"
    },
    {
      "description": "Is this operator in Japan's official MAFF list of organic JAS certified operators (domestic or foreign)? Look up by certification number, operator name (2+ chars, organizations only), country, prefecture, category or certifier. Returns found, no_longer_listed (reason not published or inferred), no_match_in_checked_list (does not mean not organic) or unknown, with certifier, category, municipality or country, certified_on, first/last seen. Confirm with the certification body.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "certification_number": {
            "description": "Certification number as published by the certification body, e.g. 060420-001 (numbers can repeat across bodies; add certifier to narrow)",
            "maxLength": 60,
            "type": "string"
          },
          "certifier": {
            "description": "Part of the registered certification body's name, e.g. Ecocert or アファス",
            "maxLength": 100,
            "type": "string"
          },
          "country": {
            "description": "Country: ISO code (CN), English name (China) or Japanese name (中国). JP = the domestic list",
            "maxLength": 60,
            "type": "string"
          },
          "limit": {
            "description": "Maximum number of listings, 1-100 (default 20)",
            "maximum": 100,
            "minimum": 1,
            "type": "integer"
          },
          "operator_name": {
            "description": "Part of the operator name in Japanese or Latin letters, at least 2 characters (organization names only)",
            "maxLength": 100,
            "type": "string"
          },
          "prefecture": {
            "description": "Japanese prefecture (Tokyo or 東京都), JIS code (13) or local government code (130001); domestic listings only",
            "maxLength": 20,
            "type": "string"
          },
          "product_category": {
            "description": "Product category: agricultural_products, processed_foods, feeds, livestock_products, algae (or the Japanese name, e.g. 有機加工食品)",
            "maxLength": 40,
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "organic_jas_lookup"
    }
  ]
}

What the leaf hashes

{"body":"edd613b6314523b897e5b2288f9080d4674e1b0d2b46b1b6485251710e03bb89","id":263996,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793033879053149,"prev":null,"subject":"77dffb9b-ba2b-4d94-b0d0-8113c22cb07a","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0x44eb30dcfe42c3afe43c0f9a68522b7482f103cb2fdcc551c72641f134a99f57
2. 0xdb8ad8b83c540b5d428112ddea01b973eec35ce3d8f1ff3555b19b0617f993fb
3. 0x5d37698926897d4be19ed9e7a19c1115a1dd5e7fa3112804f872ce869984ce01
4. 0x84553a4d26af29dcec178206ef38cb5a1aec3f538facff38242aaf309ff96b39
5. 0xce75f9a281c6ce36514519f6c390078735f1b0fd2f64cf3b01c8ca6fa92ac08d
6. 0x8633197662c64a440731fbebc58c3a6ae008b010716b8c0527f42077a1d796f8
7. 0xafdd6fc90610e7082bbe27cf37708397ea0003b86b12509475bedb7872c465c4
8. 0x93f1edadd01cd4b89fcec3322d8ba04a3a79de4ee1e4b9be485e61853b9136c1
9. 0x3fd467160a778614ee7dd47a7bb6f0b59b686f5817000f5c7895208822aa5816
10. 0x13ea36be43d4574f8bd99c733b69dbcb799cbe5f4a84b764faa11f5ceec2f679
11. 0x1204d0e3e739db3e40f40f102e1314028f064872da22239d712e0ef4cff7deed
12. 0x2b1b47804e83988d7fd5ed8179b2334f3f43b318109b54142f6c6bd749076f9e
13. 0x54b29089c0a3cbbd6ddbe58944696110984dd5f418275cb1b77f957c56da8eab
14. 0x8b27a4c21bf4ba962fd008c8f4300bc6953764a5032b9ab0cfe696b318c45326
15. 0x4b52a97f7a80ff7778a702b85267b8d2e5c93ce160942656435c29ae7be68bf4
16. 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae