Evidence row 265194

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "Get one hackathon by slug (the part after /h/ in the site URL), with bilingual details, official sources, related works and active team posts.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "slug": {
            "type": "string"
          }
        },
        "required": [
          "slug"
        ],
        "type": "object"
      },
      "name": "get_hackathon"
    },
    {
      "description": "Search hackathons listed on 黑123 (hack123.henryht.sh). Bilingual (zh/en) fields; every result has its site URL. status: upcoming = start date in the future, open = deadline today or later, ended = deadline passed (dates in UTC, YYYY-MM-DD).",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "city": {
            "description": "City name in Chinese or English, e.g. 上海 / Shanghai",
            "type": "string"
          },
          "from": {
            "description": "Earliest date (YYYY-MM-DD); matches events whose start or deadline is on/after it",
            "type": "string"
          },
          "limit": {
            "default": 10,
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "online": {
            "description": "true = online only; false = offline/hybrid only",
            "type": "boolean"
          },
          "query": {
            "description": "Keywords matched against titles, aliases, summaries, topics, cities (zh or en)",
            "type": "string"
          },
          "status": {
            "enum": [
              "upcoming",
              "open",
              "ended"
            ],
            "type": "string"
          },
          "theme": {
            "description": "Topic, e.g. AI / Web3 / 具身智能",
            "type": "string"
          },
          "to": {
            "description": "Latest date (YYYY-MM-DD); matches events whose start or deadline is on/before it",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_hackathons"
    },
    {
      "description": "Search active team-up (looking for teammates) posts from 黑123 /team. Expired posts are excluded with the same rule as the site.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "city": {
            "description": "Location, zh or en, e.g. 北京 / Beijing / 线上",
            "type": "string"
          },
          "hackathon": {
            "description": "Hackathon slug or name (zh/en)",
            "type": "string"
          },
          "limit": {
            "default": 10,
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "query": {
            "description": "Free-text keywords",
            "type": "string"
          },
          "role": {
            "description": "Wanted role, e.g. 前端 / 设计 / 算法",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_team_posts"
    },
    {
      "description": "Search hackathon projects (works) collected on 黑123 /works, by hackathon and/or tag. Tags are bilingual, e.g. agent / Agent, education / 教育学习, web / 网页应用.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "hackathon": {
            "description": "Hackathon slug or name (zh/en)",
            "type": "string"
          },
          "limit": {
            "default": 10,
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "query": {
            "description": "Free-text keywords",
            "type": "string"
          },
          "tag": {
            "description": "Tag key or name in zh/en",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_works"
    }
  ]
}

What the leaf hashes

{"body":"f4b5500838549bc915f9a456fd058c89c83907f8c22e0a30c8cc4a319c4ce789","id":265194,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793034672161990,"prev":null,"subject":"ff5aa4df-d372-4d24-bbcf-91b666030e38","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. 0xd9926a9d69d737f80636729a5b37d6edcf9ef49d050119e9e0b483e1f14c47f6
2. 0x6a046a3b0a1c09b12de053f7ef4dcc655a0ddc322e094eb1faea737d68dfeedc
3. 0x8cb950d4cbbe1451235e757f3d3865202fb58279d91258fc67556cdf028bd1f0
4. 0xae1fb6e04f7a19b3fdddadd8ff13c8e41de2fa3911959a758f914a8cc458e672
5. 0xcfaf7198a3327f6e9d62c133a5e3a24e083e978c95c596fbe3c6fd46cecc88dd
6. 0xe135c029ddda85e4abd7500da4875d00d482720878667e08b4ad5625458b18e1
7. 0x5fedf5dd5a9b07477616fa514b8028a3dd543bf5a269cae8f621cd937dc7a3ba
8. 0x681ec19f030800a929fd033e65e3f128d9c73238d9fd41cc3a03946fcfba5931
9. 0x1b23ae9cb60fc98b940d53fe845cfa898a20f2099e94c5247f0e02b3e1cac18f
10. 0x60b48a1bcbe1b49c2b79abc9db170c07e64ed7296971e4a62ed6c2c279c87576
11. 0xc65997d4cbe46cfb99054bd5df6a660823432d48a8d7d21b0c1bed1df236af25
12. 0x3704bc5ad033a79977899a5ead894cf50c0b8c8432c020959cefe2af561eb5ee
13. 0xcd9e3af1fa905ec61b99ee9442716d7c7a439aecacd018ec229a24def1cabf6b
14. 0x6b927d53caa5125cdba9255612d524976c691f8672796c3f0885ba2c5b3af1ad
15. 0x6dc40f983a3840a0ad927a9ca17f4ff1e3b649a6c735e2a09b140db7c2caf13b
16. 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae