Evidence row 216321

What was observed

{
  "count": 6,
  "tools": [
    {
      "description": "Fetch the canonical public machine index for one ClinicMarketIQ dataset family, including provenance-facing download metadata and immutable manifest pointer.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "dataset": {
            "description": "Dataset family ID such as D02, or its catalog slug.",
            "maxLength": 64,
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "dataset"
        ],
        "type": "object"
      },
      "name": "get_dataset_metadata"
    },
    {
      "description": "Return canonical direct download URLs and declared SHA-256 values for a public dataset. This tool never proxies the dataset bytes.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "dataset": {
            "description": "Dataset family ID such as D02, or its catalog slug.",
            "maxLength": 64,
            "minLength": 1,
            "type": "string"
          },
          "format": {
            "default": "any",
            "enum": [
              "any",
              "csv",
              "jsonl"
            ],
            "type": "string"
          },
          "group": {
            "maxLength": 200,
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "dataset"
        ],
        "type": "object"
      },
      "name": "get_download_url"
    },
    {
      "description": "Fetch schema JSON declared by a dataset's immutable public manifest. If schema_name is omitted, returns all declared schemas (currently capped at 10).",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "dataset": {
            "description": "Dataset family ID such as D02, or its catalog slug.",
            "maxLength": 64,
            "minLength": 1,
            "type": "string"
          },
          "schema_name": {
            "maxLength": 200,
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "dataset"
        ],
        "type": "object"
      },
      "name": "get_schema"
    },
    {
      "description": "List public ClinicMarketIQ dataset families from the canonical catalog. Returns metadata summaries, not observation rows.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "limit": {
            "default": 25,
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "offset": {
            "default": 0,
            "maximum": 10000,
            "minimum": 0,
            "type": "integer"
          }
        },
        "type": "object"
      },
      "name": "list_datasets"
    },
    {
      "description": "Search public dataset family IDs, names, slugs, and publishers in the canonical ClinicMarketIQ catalog.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "limit": {
            "default": 25,
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "query": {
            "maxLength": 200,
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "search_datasets"
    },
    {
      "description": "Compare a caller-provided SHA-256 digest with the canonical digest declared in the public dataset machine index. This bounded check does not download or re-hash large artifact bytes.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "dataset": {
            "description": "Dataset family ID such as D02, or its catalog slug.",
            "maxLength": 64,
            "minLength": 1,
            "type": "string"
          },
          "filename": {
            "maxLength": 255,
            "minLength": 1,
            "type": "string"
          },
          "sha256": {
            "pattern": "^[a-fA-F0-9]{64}$",
            "type": "string"
          }
        },
        "required": [
          "dataset",
          "filename",
          "sha256"
        ],
        "type": "object"
      },
      "name": "verify_checksum"
    }
  ]
}

What the leaf hashes

{"body":"d2f5dc1d9b7a24553bdb514e1709b6f3700d940bbc72cb0d7988e6695f2a8697","id":216321,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793026518823890,"prev":null,"subject":"6a3d803f-1def-45ac-a99e-0c0d394f154b","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. 0x4efb570f257be53d1c5d4c15de8b220cff425795c3755cd02354dcec27e2a5ce
2. 0xe769efa69b42cb6398a7197bc65f8b508f1f7ed9acf0523bda30286b54dfa2c8
3. 0xc565d7a8159f8a21c8339d204e2d5204a3ac9531db0c9c8147d0bef0d8ef0e01
4. 0x1fcc0d2b402cb547c9b1c195a9f43e049c27bd3c964c946d195c80b3b94bdd12
5. 0xe1f6caa329bf806e382a3df3827c2a5c372227e82ffe5a4f4dbbb850323347b4
6. 0x012548371e90cea65f115b233252bd731a5a22e353ce9d0377ed6a07adababf9
7. 0xbadf5b3ecd991e0cc584f28e783ab388f96fadfd2d0382df327a0697c51b4080
8. 0x1894256ba4a97682ee230b576a7ab9f4db049d9f44d391cdd0fba2ec210defd6
9. 0x25b0be634e7545b7ace2747b38a9f79252646981a8a77be5d6b0f4fe6758bedb
10. 0x9c9aa21507586994cc0a4dfd3b2e86976a38eb16db18f84817d4a85797c70f48
11. 0x72d408a0419640ce55a8ca5f9c16e8da5334b5f106300a379634eb22bded71e1
12. 0xaf14a84837a57dc5a0cb0ebd158daaad24c19301b9257d9e97c322a7d8c54bc0
13. 0xf7d2cf278e5d2768b8bdb70730c378877cf7165d8efcbec8bcd3282fdc50d177
14. 0x0733993143f0230e79482cef2c38e95d98f9eafbe64a43cdc74a4545938a4167
15. 0x2be1e80e065dd6b2cc75a7142be22225acd144ac975d70bf24b4f01fd76dc497
16. 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae