Evidence row 1289136

What was observed

{
  "count": 8,
  "tools": [
    {
      "description": "Subscribe an HTTPS endpoint to new registry changes. Save the returned secret; it is shown once.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "entity_ids": {
            "items": {
              "pattern": "^[A-Z]{2}-[A-Z]{2}:",
              "type": "string"
            },
            "maxItems": 10000,
            "type": "array"
          },
          "event_types": {
            "items": {
              "enum": [
                "business.created",
                "business.name_changed",
                "business.status_changed",
                "business.address_changed",
                "business.agent_changed",
                "business.officers_changed"
              ],
              "type": "string"
            },
            "type": "array"
          },
          "jurisdictions": {
            "items": {
              "pattern": "^[A-Z]{2}-[A-Z]{2}$",
              "type": "string"
            },
            "type": "array"
          },
          "name": {
            "minLength": 1,
            "type": "string"
          },
          "url": {
            "format": "uri",
            "type": "string"
          }
        },
        "required": [
          "name",
          "url"
        ],
        "type": "object"
      },
      "name": "create_subscription"
    },
    {
      "description": "Revoke your subscription.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "id": {
            "type": "string"
          }
        },
        "required": [
          "id"
        ],
        "type": "object"
      },
      "name": "delete_subscription"
    },
    {
      "description": "Returns one business by an ID like US-VA:11406679, with dates in YYYY-MM-DD format.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "id": {
            "type": "string"
          }
        },
        "required": [
          "id"
        ],
        "type": "object"
      },
      "name": "get_business"
    },
    {
      "description": "Returns events for a business ID like US-VA:11406679; dates use YYYY-MM-DD and next_cursor pages through more results.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "cursor": {
            "type": "string"
          },
          "id": {
            "type": "string"
          },
          "limit": {
            "exclusiveMinimum": 0,
            "maximum": 9007199254740991,
            "type": "integer"
          }
        },
        "required": [
          "id"
        ],
        "type": "object"
      },
      "name": "get_business_events"
    },
    {
      "description": "Returns available registry sources and their latest verified YYYY-MM-DD dates.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "list_sources"
    },
    {
      "description": "List your subscriptions without signing secrets.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "list_subscriptions"
    },
    {
      "description": "Returns matching businesses; IDs look like US-VA:11406679, dates use YYYY-MM-DD, and next_cursor pages through more results.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "cursor": {
            "type": "string"
          },
          "entity_type": {
            "type": "string"
          },
          "formed_after": {
            "type": "string"
          },
          "formed_before": {
            "type": "string"
          },
          "jurisdiction": {
            "type": "string"
          },
          "limit": {
            "exclusiveMinimum": 0,
            "maximum": 9007199254740991,
            "type": "integer"
          },
          "q": {
            "type": "string"
          },
          "status": {
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_businesses"
    },
    {
      "description": "Returns business.created, business.name_changed, business.status_changed, business.address_changed, business.agent_changed, or business.officers_changed events, newest first; dates use YYYY-MM-DD, business IDs look like US-VA:11406679, and next_cursor pages through more results. To poll for new events, pass after=<id of the last event you have>: results are then oldest first, and you call again with the last id while pages are full.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "after": {
            "type": "string"
          },
          "cursor": {
            "type": "string"
          },
          "jurisdiction": {
            "type": "string"
          },
          "limit": {
            "exclusiveMinimum": 0,
            "maximum": 9007199254740991,
            "type": "integer"
          },
          "observed_since": {
            "type": "string"
          },
          "since": {
            "type": "string"
          },
          "type": {
            "type": "string"
          },
          "until": {
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_events"
    }
  ]
}

What the leaf hashes

{"body":"1378f4c3e3f4f71e0bd96c77d7084cfab9a46ac55038668beb71ac1811a0d547","id":1289136,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793396239300846,"prev":570341,"subject":"5498d6bc-0426-4bb4-ba6f-ca37e6f10d3e","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-30 (243099 rows).

1. 0x81f8323fc11dab6d5fd14ac923c4997df81a9a3452e44037017b555f780500b2
2. 0x0dfed2683ba96904e424f29ed4754e716338f4b601470c99c5fe53823fb96c68
3. 0xfc86a142525ebe0ebcb8c69dc25877def31a8332a170a2501b4eb37d120524ae
4. 0x82e1d3c94f9302f9afe5c28af6300d3bed69a389a41ac0e8228446478ef2edba
5. 0x6d66fc89e1e1aa386d4d7a89a27538a619d07f560e28364b52587d402bc9b78b
6. 0x6906d49a2e099f749097ac889ca54c00b2db4decbdb2c56589995ffaa4a77407
7. 0xcb053ab5570cd2abd0ea46035456c9a61a0d54df9deddc862d8ef37856fc5fd4
8. 0x166f6f268ed9a479f4b60a2889820ad9c97ab07b442d4fe6991f642fdc16982b
9. 0xcf62c49bcc390f3aab6f9f942c5c6924119985e60578c1a0f074eee6b96fb464
10. 0xf07d3e6c09355944052d6499f8cf17c9d384e28caa427caa56637b8af554ddc8
11. 0xb6f159a45d11e217321f5b167039fc2611dce674daf03115b93f4b8241c85536
12. 0x79428b3f9b70cdefeefabb76ccc48d190eafc8c9b15ed30ce0a8c43d319c4272
13. 0x386dbe0266e62db019a818ac71a5b2e72b65071ce2bcd7f64efaa40322e5f002
14. 0x2cc23d59d659d5b819934005bab57d036b04ff4c8b701cb0e274c40aaddb2d51
15. 0x235114e50a987e65d728b9ef8b5978846cd7c01f22effc55dd604c388ce359ec
16. 0xdbaaffa44665d1fa60d33d2c4075bd87629b76d01a6ee63e621e78590303b56d
17. 0xffe660edb9e5c6e3449a49454634c3e7b2f9fe703e5697f723b021735647ab7e
18. 0x30a81d8fcef4e8f9e2877c62796cfc5612fc1b251127d531dee28f8dbd5c5147

Day root

0x0826c7ad6039e06a2360ca0a4a3a4fe7f2626c6dc19f71a37599386f78b39875

Chained

0x36b4c8a1063758f0b8765fa1bdf75fa92fb543cc183add3e261880ee2bd1f822

Published

On Arc Testnet, block 69923247: 0x8704744146c6967c8abc9e9a99de4db7283b29e840922ea83a69b6fe776e6861