Evidence row 738488

What was observed

{
  "count": 3,
  "tools": [
    {
      "description": "Look up a company by its directory slug (from search results) or by any of its state license or registration numbers.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "license_number": {
            "description": "e.g. Texas 'ACR-2494522', California CSLB '1000002'",
            "type": "string"
          },
          "slug": {
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "get_provider"
    },
    {
      "description": "Find fire protection companies with an active state license. Covered: Texas (Texas State Fire Marshal's Office) and California (California Contractors State License Board). Filter by state, city, county, service (fire-sprinkler, fire-alarm, fire-extinguisher) or company name. With a city, results list companies with an office in that city first, then others in the same county; within each group the order is alphabetical (no company pays for placement). Every result includes license numbers, expiration dates, the regulator, a page URL and a cite_as string; please cite the URL when you use a result.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "city": {
            "description": "City, optionally with state: 'Dallas' or 'San Diego, CA'",
            "type": "string"
          },
          "county": {
            "description": "County, e.g. 'Harris'",
            "type": "string"
          },
          "include_lapsed": {
            "description": "Also return companies whose license lapsed (default false)",
            "type": "boolean"
          },
          "include_nearby": {
            "description": "With city: also include same-county companies (default true)",
            "type": "boolean"
          },
          "limit": {
            "description": "Max results (default 10)",
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "query": {
            "description": "Company name or part of it",
            "type": "string"
          },
          "service": {
            "enum": [
              "fire-sprinkler",
              "fire-alarm",
              "fire-extinguisher"
            ],
            "type": "string"
          },
          "state": {
            "description": "State code or name, e.g. 'TX' or 'California'",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_providers"
    },
    {
      "description": "Check whether a fire protection license or registration number is active, which company holds it, and when it expires. Covered: Texas (Texas State Fire Marshal's Office) and California (California Contractors State License Board). Data is a periodic snapshot of state records; the official lookup is linked.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "license_number": {
            "description": "e.g. Texas 'ECR-1751485', California CSLB '1000002'",
            "type": "string"
          }
        },
        "required": [
          "license_number"
        ],
        "type": "object"
      },
      "name": "verify_license"
    }
  ]
}

What the leaf hashes

{"body":"b487075302d7465a449992f8193ba23d3b9adab820d48c56ddada84b68da489b","id":738488,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793160766669520,"prev":null,"subject":"3ba33a0e-33ed-469d-92fe-e8b632a85afe","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-28 (231336 rows).

1. 0xa760c7e5b565a8c8c9cc79a4e1318327aa409e18fdfad848d8b6b35fb26e6ef0
2. 0xff8d6320f2133968d8b787db3201e832b878cf92c4a8e158deee5ee0ce24520c
3. 0x919134d5dc6ac68754116eea051a31cbaff9d9e9bbd814cc8228edc7847f654f
4. 0x8dae718a232f69aecadd1ce16979f74f87095b68e5bccbaca14e0d6fe55b8d0b
5. 0xb0ef4ffb2b28541e88b378ea73bb6616b67a1c8b66034a6599c002bbe4363b48
6. 0x27a80ad27d7fa299c2bfb6dad30b4c555388016ba83ebccf541abe102bd895b7
7. 0x30aa9127eb0d341a85345c4a1aae0508918986c839d4f27ada1f7cf77196fbed
8. 0x74ec62251e1464be11facb578d69bc77ac4e041a6b4a1afbaa3132a976334e94
9. 0xf7933c5d253b6228aed69bf6728383cc560644dd29c613cc9076f9edba531d60
10. 0x55a723f0cd90d864d42078aaa9533e2ed47e5eedc9e6b58e618f804382799638
11. 0x0ef5a84eb9ef9c36fdfd7aef254e503a1881d71abefacc2f92a6e6d8302b3db3
12. 0xe5d51c9aa3c14e4c7b57606d58c74de94b65d308e5aceacb82e415d83f1e2fe1
13. 0xb5454b2881dcf5871db87f595c9d60eba5c4fd664d097bbcb5ca16283b093246
14. 0x518f746edef7675640c92fbe2c056392702ec8f1ebbb6ede597bd5f7c0c5aea1
15. 0xcd8084fb60eb6be382a8750a344eb425404f5162e8ae3db9a15ef555a7942b85
16. 0x0f8977bd16865247451d1ee836b084081d3d0cd17d6a07353fad0c70393c7403
17. 0xe08e8bd91858a8a10c46ecde9c29a6288b960987303173c5e882afb46ce91fa0
18. 0xe6cfe00ae4e02bc12327e45b5f3334ea5850ba3bcc8e3101d30a8189856a95af

Day root

0x2c19037464cc4c493624565f01775d6446fc78eaa118fc6865bfe2bfca9ff78e

Chained

0xd1d7dee8322ceff8f4c8d83aa1fe4a4466825c2af1c97dbde3d35db61234f7be

Published

On Arc Testnet, block 69584042: 0x8bae2b1d097834c8b458513862d70d29ee807e98dc2e863b27250131c15b35ae