Evidence row 222863

What was observed

{
  "count": 2,
  "tools": [
    {
      "description": "Look up a stable surname ID returned by search_surnames, with Census rank, count, source and actual collection pages. not_found applies only to this 3,000-record subset.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "id": {
            "description": "Stable surname ID, for example smith. Case-insensitive.",
            "maxLength": 64,
            "minLength": 1,
            "pattern": "^[a-zA-Z '-]+$",
            "type": "string"
          }
        },
        "required": [
          "id"
        ],
        "type": "object"
      },
      "name": "get_surname_record"
    },
    {
      "description": "Filter 3,000 imported 2010 U.S. Census surname records or the website's curated collections. Returns rank-ordered, paginated records and sources. No meanings or availability checks.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "initial": {
            "pattern": "^[a-zA-Z]$",
            "type": "string"
          },
          "limit": {
            "default": 20,
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "maxLength": {
            "maximum": 64,
            "minimum": 1,
            "type": "integer"
          },
          "maxRank": {
            "maximum": 3000,
            "minimum": 1,
            "type": "integer"
          },
          "minLength": {
            "maximum": 64,
            "minimum": 1,
            "type": "integer"
          },
          "minRank": {
            "maximum": 3000,
            "minimum": 1,
            "type": "integer"
          },
          "offset": {
            "default": 0,
            "maximum": 3000,
            "minimum": 0,
            "type": "integer"
          },
          "prefix": {
            "maxLength": 64,
            "minLength": 1,
            "pattern": "^[a-zA-Z '-]+$",
            "type": "string"
          },
          "query": {
            "description": "Case-insensitive substring of a surname; not a natural-language prompt.",
            "maxLength": 64,
            "minLength": 1,
            "pattern": "^[a-zA-Z '-]+$",
            "type": "string"
          },
          "scope": {
            "default": "source",
            "enum": [
              "source",
              "website",
              "last-name-ideas",
              "family-name-ideas"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_surnames"
    }
  ]
}

What the leaf hashes

{"body":"10d6eef468e587e766a1cc27a1644ff1dfbde2c7df094205e8680693623eb814","id":222863,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793028325195314,"prev":null,"subject":"7c544040-dbf8-4ea6-9943-ab06d7b3b435","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. 0xaa49708f1c3834c94bba0349ca7b89fe850293471bd809781d3f3e0370161a59
2. 0xcf5e9e67fee5064936012a37642ded471c88f1390c8941de1a7202d0c4bc65f3
3. 0x8f27831bfc9207014b60ae1c7b6956d2564838b0376b6d0e0cc21997056463cb
4. 0xe96bd5404192a90d999fb992b3a95bed199b3a08fd2223ac1d2d9a9facbb54e6
5. 0x59831c39097bda1e1a2b7c20017b39949c9af4cbe95ddc9377224d9961b141f5
6. 0xc4ab83986370216e6392f7761646da89dc03ce444c394dccbea8455e49e11d08
7. 0x2c2bafa3ae2c3b60ebb68ee8d5203890776af454d75867b37695e9107fd4853b
8. 0x1384e1ef3d0d8138ca28b70f42df9158e31049aa3e35eba3cecfa1f55851e740
9. 0xe7f83b801d018002e7531c4480322b014df1895f3992ff851869b6321bddda45
10. 0x382774117c6a99ced4320ca176d4e72cc7226f2fa6e3d8ac0173511fe55d6919
11. 0x55ba80743bf45624f0b04651dfd0a37e2a85f91f45e334ff14efbb74a49dd361
12. 0x09a19b8d31a6e948e5051cb72b98b1d2b2bfe053f62d6d24d61c22b3ed1c3f24
13. 0x4700d6dfdb40e52e2ceb8ffe62c75f3f708d23452f828255fd003d795f5d9d66
14. 0x3b4dba7d874fc323b0a364140a9c60f37bf547fe671897653118a9873fe03420
15. 0x1a74ed3b3756b9cd946da49701bcec120ec88645013da99fa9eea60b39e1a570
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae