Evidence row 303649

What was observed

{
  "count": 10,
  "tools": [
    {
      "description": "Decode base64 to text (UTF-8). Errors on invalid base64.",
      "inputSchema": {
        "properties": {
          "text": {
            "type": "string"
          }
        },
        "required": [
          "text"
        ],
        "type": "object"
      },
      "name": "base64_decode"
    },
    {
      "description": "Base64-encode a text (UTF-8).",
      "inputSchema": {
        "properties": {
          "text": {
            "type": "string"
          }
        },
        "required": [
          "text"
        ],
        "type": "object"
      },
      "name": "base64_encode"
    },
    {
      "description": "Convert CSV (with header row) to an array of row objects.",
      "inputSchema": {
        "properties": {
          "text": {
            "description": "CSV document",
            "type": "string"
          }
        },
        "required": [
          "text"
        ],
        "type": "object"
      },
      "name": "csv_to_json"
    },
    {
      "description": "SHA-256, SHA-1, SHA-512 and MD5 hex digests of a text.",
      "inputSchema": {
        "properties": {
          "text": {
            "description": "text to hash",
            "type": "string"
          }
        },
        "required": [
          "text"
        ],
        "type": "object"
      },
      "name": "hash_text"
    },
    {
      "description": "Pretty-print JSON with 2-space indent.",
      "inputSchema": {
        "properties": {
          "indent": {
            "description": "default 2, max 10",
            "type": "integer"
          },
          "text": {
            "type": "string"
          }
        },
        "required": [
          "text"
        ],
        "type": "object"
      },
      "name": "json_format"
    },
    {
      "description": "Minify JSON (strip whitespace).",
      "inputSchema": {
        "properties": {
          "text": {
            "type": "string"
          }
        },
        "required": [
          "text"
        ],
        "type": "object"
      },
      "name": "json_minify"
    },
    {
      "description": "Validate a JSON string; on error returns line/column and message.",
      "inputSchema": {
        "properties": {
          "text": {
            "description": "JSON document to validate",
            "type": "string"
          }
        },
        "required": [
          "text"
        ],
        "type": "object"
      },
      "name": "json_validate"
    },
    {
      "description": "Decode a JWT header + payload (no signature verification), report expiry status.",
      "inputSchema": {
        "properties": {
          "token": {
            "description": "the JWT (3 dot-separated parts)",
            "type": "string"
          }
        },
        "required": [
          "token"
        ],
        "type": "object"
      },
      "name": "jwt_decode"
    },
    {
      "description": "Current time (ISO-8601 and unix). Optionally convert an ISO timestamp or unix epoch and get a human-readable relative delta.",
      "inputSchema": {
        "properties": {
          "iso": {
            "description": "ISO-8601 timestamp to convert",
            "type": "string"
          },
          "unix": {
            "description": "unix epoch seconds to convert",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "now"
    },
    {
      "description": "Generate random UUIDv4s (1-100).",
      "inputSchema": {
        "properties": {
          "n": {
            "description": "how many (default 1, max 100)",
            "type": "integer"
          }
        },
        "type": "object"
      },
      "name": "uuid"
    }
  ]
}

What the leaf hashes

{"body":"26771e6916078421c349cd2792e2c40e192873b7373556c0d639bc519a83c267","id":303649,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793055442097593,"prev":null,"subject":"91be85c6-295a-4bfa-afea-630d20165f1f","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. 0xccdafea74d4f96af9036bd568dfc66b9ed8cf4c9e4c247afbd6d3f25a37e850e
2. 0x52e390848b3a3dfafcc9bb152b7b7cea86cc71141507e7da41a6d297aa386ea5
3. 0xaff93c4d7ffa1312f97a0e1ad2f9e708e0c46e800c91ce49f5dcfebeaa9c49f5
4. 0x8e4922a3cad5b7e5f092d55a80ae711a5ae82f3c527d6b05869991bc40e28b92
5. 0x616200c8824b3059f76645d1ec106feee535f524d385229188ef1fff31423f99
6. 0xbe6b15b148df61bcc699d5e4f1cd8cbf001f57aeb95268555b52a1cee86ecb09
7. 0x5294e690b4a72a0b66d23e06de2d92fab6c95ef7f78dc6d82e8b3f9067c4922a
8. 0xb92889ad8092cdb7d671697d8f5001aaac63f56b3ee0b9463e6065f6145d63b5
9. 0xa7e1a958c75c2132f2dfb5bb8d77a956e893b026f4ef740e1228d64d9c61b866
10. 0x28f5e3a424e6df882445451ebbb98ea4799c643ef3231cda98518a826f880a47
11. 0x1233e806ac6f264fea872a85785df4b3024b89e9788bb6dfa89e28944cb30400
12. 0x85ea84dc356483b05e7ec8ed6e303988684070a1512dc756c8e64a7e3604feaf
13. 0x985acd37cc044d5aa6ad959194da8e91c81045df83517891ed92f1763a9ab825
14. 0x5b20d8aab05225a3497eadcce89d2e2a586a510fb31334793d3f46f88f0157c5
15. 0xe94ca5b798e9899ad611e57835af42266e20f53f44977e487d81365e30972beb
16. 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae