Evidence row 309581

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "Course description, audience, prerequisites, access terms and the list of lectures with key concepts and URLs.",
      "inputSchema": {
        "properties": {
          "lang": {
            "default": "en",
            "description": "Content language (ISO 639-1). Default: en",
            "enum": [
              "ru",
              "en",
              "de",
              "fr",
              "es",
              "zh",
              "ja",
              "ar",
              "pt",
              "hi",
              "tr",
              "ko",
              "it",
              "id",
              "bn",
              "sw",
              "ta",
              "vi",
              "th",
              "tl"
            ],
            "type": "string"
          },
          "slug": {
            "description": "Course slug from search_courses",
            "type": "string"
          }
        },
        "required": [
          "slug"
        ],
        "type": "object"
      },
      "name": "get_course"
    },
    {
      "description": "Full text of a knowledge-base article in Markdown.",
      "inputSchema": {
        "properties": {
          "lang": {
            "default": "en",
            "description": "Content language (ISO 639-1). Default: en",
            "enum": [
              "ru",
              "en",
              "de",
              "fr",
              "es",
              "zh",
              "ja",
              "ar",
              "pt",
              "hi",
              "tr",
              "ko",
              "it",
              "id",
              "bn",
              "sw",
              "ta",
              "vi",
              "th",
              "tl"
            ],
            "type": "string"
          },
          "slug": {
            "type": "string"
          },
          "topic": {
            "type": "string"
          }
        },
        "required": [
          "topic",
          "slug"
        ],
        "type": "object"
      },
      "name": "get_guide"
    },
    {
      "description": "Search published video courses of Skillaria.Top (AI, DevOps, Linux, Git, vibe coding). Empty query lists all courses.",
      "inputSchema": {
        "properties": {
          "lang": {
            "default": "en",
            "description": "Content language (ISO 639-1). Default: en",
            "enum": [
              "ru",
              "en",
              "de",
              "fr",
              "es",
              "zh",
              "ja",
              "ar",
              "pt",
              "hi",
              "tr",
              "ko",
              "it",
              "id",
              "bn",
              "sw",
              "ta",
              "vi",
              "th",
              "tl"
            ],
            "type": "string"
          },
          "query": {
            "description": "Keywords, e.g. \"linux permissions\"",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_courses"
    },
    {
      "description": "Search free knowledge-base articles (how-tos, cheat sheets, explanations) by keywords. Returns titles, summaries and URLs.",
      "inputSchema": {
        "properties": {
          "lang": {
            "default": "en",
            "description": "Content language (ISO 639-1). Default: en",
            "enum": [
              "ru",
              "en",
              "de",
              "fr",
              "es",
              "zh",
              "ja",
              "ar",
              "pt",
              "hi",
              "tr",
              "ko",
              "it",
              "id",
              "bn",
              "sw",
              "ta",
              "vi",
              "th",
              "tl"
            ],
            "type": "string"
          },
          "query": {
            "type": "string"
          },
          "topic": {
            "description": "Optional topic slug, e.g. git, linux",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_guides"
    }
  ]
}

What the leaf hashes

{"body":"5b7d856f775a453ba3f51128b3646da353652b263197e0d172538ca8846b98be","id":309581,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793058988338420,"prev":null,"subject":"617b6a2c-5d7d-44fc-833a-ef0ce9360136","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. 0xeaab07eef8623d175fbe532b88fc7357892d795cc3cceafc335da71b7b564eb0
2. 0x7be39b0403bb05b7a92af35ac2a7f8ceb269a8885d5a9a857144536010449044
3. 0x9447e3761f282e4f63195ca98df2c1f3366f050fd19662e6179b5ca0cccc63e1
4. 0x999e7f23eebed533179e1a9834246946f37f6e090476e7b9842b1d4ae2e605f9
5. 0xd3283e36b9b60755e3e026229375c2a2d0d23ca8a962ada6b373a94cbc40c12b
6. 0x8f9c90f7c2df38a6304d7076212ebcdfa3fcbf44f9154f9242ee812fb6a90e3e
7. 0x1b70eb5ab3d0f191475b8ce6bc90b7b79ea85ee478bbb10b0bc97ea44efaa9dd
8. 0x43b4a8377c6efe91fc41594a4167ab794706d4b8819d4005420eb9f1685286a4
9. 0x040da2afce3b46dd19e10a07c8a922d307dc57a0b4fda58c06ade8e13100b0f9
10. 0xff16d371a8eaadc371c58dcf9b184d5ab1247c8848ee5dc228c393f057e7e29d
11. 0xdcbb0cc500d2b659c111afe9a926b2aafdcc6f6d034768498b0b7295973f9245
12. 0x22a204f0cf299dd3152f1542ba9998ff7665390da1ede6e58d06b8a7b2a107ee
13. 0xec98ca25cb12ffed7c3e1373971719ce414ee6deecd1e7724b2979e2c356d99f
14. 0x614d844c9e0509d9f9e63697aa2935555bce5f13695a8dc0047aa9e9898d70b3
15. 0x95657a7d540ed6cac0bde9995782333b2562a9a6641853269ac95148827410f0
16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae