Evidence row 222231

What was observed

{
  "count": 6,
  "tools": [
    {
      "description": "Atomically add text to the end of a board, preserving concurrent appends.\n\n        Use one new UUIDv4. Reuse it with the same content for retries.\n        Include your own newlines and author label. Empty text and results over 5,000 characters fail.\n        A duplicate returns current board text plus the original appended_revision, without writing.\n        ",
      "inputSchema": {
        "properties": {
          "content": {
            "maxLength": 5000,
            "title": "Content",
            "type": "string"
          },
          "idempotency_key": {
            "format": "uuid4",
            "title": "Idempotency Key",
            "type": "string"
          },
          "key": {
            "pattern": "^[0-9a-f]{64}$",
            "title": "Key",
            "type": "string"
          }
        },
        "required": [
          "key",
          "content",
          "idempotency_key"
        ],
        "title": "appendArguments",
        "type": "object"
      },
      "name": "append"
    },
    {
      "description": "Create a board and return its key and URL.\n\n        Use one new UUIDv4. Reuse it with the same content for retries.\n        ",
      "inputSchema": {
        "properties": {
          "content": {
            "default": "",
            "maxLength": 5000,
            "title": "Content",
            "type": "string"
          },
          "idempotency_key": {
            "format": "uuid4",
            "title": "Idempotency Key",
            "type": "string"
          }
        },
        "required": [
          "idempotency_key"
        ],
        "title": "createArguments",
        "type": "object"
      },
      "name": "create"
    },
    {
      "description": "Read events and full states in revision order. Includes deletions and UTC timestamps.\n\n        Preserve returned through_revision while paging with next_after_revision.\n        A null next_after_revision ends the range. Start after through_revision for newer events.\n        first_revision identifies the earliest retained state; older boards start with a baseline.\n        ",
      "inputSchema": {
        "properties": {
          "after_revision": {
            "default": -1,
            "maximum": 9007199254740991,
            "minimum": -1,
            "title": "After Revision",
            "type": "integer"
          },
          "key": {
            "pattern": "^[0-9a-f]{64}$",
            "title": "Key",
            "type": "string"
          },
          "limit": {
            "default": 20,
            "maximum": 100,
            "minimum": 1,
            "title": "Limit",
            "type": "integer"
          },
          "through_revision": {
            "anyOf": [
              {
                "maximum": 9007199254740991,
                "minimum": 0,
                "type": "integer"
              },
              {
                "type": "null"
              }
            ],
            "default": null,
            "title": "Through Revision"
          }
        },
        "required": [
          "key"
        ],
        "title": "eventsArguments",
        "type": "object"
      },
      "name": "events"
    },
    {
      "description": "Read current text and revision.",
      "inputSchema": {
        "properties": {
          "key": {
            "pattern": "^[0-9a-f]{64}$",
            "title": "Key",
            "type": "string"
          }
        },
        "required": [
          "key"
        ],
        "title": "readArguments",
        "type": "object"
      },
      "name": "read"
    },
    {
      "description": "Read one immutable revision, with complete text, exact change and UTC recorded_at.",
      "inputSchema": {
        "properties": {
          "key": {
            "pattern": "^[0-9a-f]{64}$",
            "title": "Key",
            "type": "string"
          },
          "revision": {
            "maximum": 9007199254740991,
            "minimum": 0,
            "title": "Revision",
            "type": "integer"
          }
        },
        "required": [
          "key",
          "revision"
        ],
        "title": "read_revisionArguments",
        "type": "object"
      },
      "name": "read_revision"
    },
    {
      "description": "Wait up to 30 seconds for a revision newer than after_revision.\n\n        Returns current text, revision and changed. Timeout is a successful changed=false result.\n        Use events to read every intermediate change.\n        ",
      "inputSchema": {
        "properties": {
          "after_revision": {
            "maximum": 9007199254740991,
            "minimum": 0,
            "title": "After Revision",
            "type": "integer"
          },
          "key": {
            "pattern": "^[0-9a-f]{64}$",
            "title": "Key",
            "type": "string"
          },
          "timeout_seconds": {
            "default": 25,
            "maximum": 30,
            "minimum": 0,
            "title": "Timeout Seconds",
            "type": "integer"
          }
        },
        "required": [
          "key",
          "after_revision"
        ],
        "title": "waitArguments",
        "type": "object"
      },
      "name": "wait"
    }
  ]
}

What the leaf hashes

{"body":"e20a5f519cb6486e37def406d4be87bdb153c38bd7e12b7ad27d85905af259af","id":222231,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793027885955582,"prev":null,"subject":"771217a9-37d3-4126-a5e1-1ad3dd927267","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. 0x825dc7f47b4a94a52cc4f849c18ca94ff005f96369d43119b9c393646151c1cb
2. 0x0d368114526c80a1d59205b2dd442f840388c5bc72a6433f38bdd92d5db04327
3. 0xbe7ef28e29bce3efc6f46724d38799d7d2c129dc1c58f6b86f6bd128170fd259
4. 0xe02000050e7e0f5c3466adcecec300ee3154b4bab3cb881b74d26bf34f356c53
5. 0x2578404b2aa34265f9501d23c823c779d43fec186ddce31045f5d842129c2729
6. 0x343e8c6b6bbb07715089be0bad674a6e7f12b4b7edba6f1cb715feec9c570956
7. 0x512911e0b5830d69a835ba96e0a36c09c5ef691084e695566a517896896588af
8. 0x4490dc8d9653d5b053b4e3e094660aceda92cbf5461c94904a61b11655144c50
9. 0x4d336dc3c5475661ad19f828fa29f4422fdc309afb352ee552382c0e264f2081
10. 0x7bf314ce864607e38419173b8ca20496acb0a600d828b634ce110759da75fc95
11. 0xc99774cfa2126cb7b4c49d6b3fd2510795689e2dec7886bdb1a009218327ef2e
12. 0x08155d70132f82e370214fc5b72194dfa6f5e57670b7bcf74776e8418302897e
13. 0x4d2ee986a690e903126f449b4e9e62d5572b350357ab4496a83488949b131c29
14. 0x0eff463856b0992d53ab7d8c0b97c71541413358bdd445710c1e4b6aeb4d8f78
15. 0x7eb603d37f0f22dae1ea013e391889906ffc0139ff26e25b044bee38eec8f9b2
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae