Evidence row 1286624

What was observed

{
  "endpoints": [
    [
      "web",
      "https://github.com/smdesai27/math-board"
    ]
  ],
  "name": "Math board",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-30T18:22:56.575716Z",
        "status": "active",
        "statusChangedAt": "2026-10-30T18:22:56.575716Z",
        "updatedAt": "2026-10-30T18:22:56.575716Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "A local, view-only chalkboard the model draws on: equations, plots, molecules and diagrams.",
      "name": "io.github.smdesai27/math-board",
      "packages": [
        {
          "environmentVariables": [
            {
              "description": "Set to 1 and board_open only returns the board's URL instead of opening it in the default browser.",
              "format": "string",
              "name": "MATH_BOARD_NO_BROWSER",
              "placeholder": "1"
            },
            {
              "description": "Folder for this board's autosave and named saves, used as given (PI_MATH_BOARD_DATA_DIR, the old name, also works). Default: the mcp/ subfolder of the board's data folder. A plain checkout keeps lessons in <package>/.data; an npm or npx install uses a per-user folder: ~/Library/Application Support/math-board on macOS, $XDG_STATE_HOME/math-board or ~/.local/state/math-board on Linux, %LOCALAPPDATA%\\math-board on Windows.",
              "format": "filepath",
              "name": "MATH_BOARD_DATA_DIR"
            }
          ],
          "identifier": "pi-math-board",
          "registryType": "npm",
          "transport": {
            "type": "stdio"
          },
          "version": "0.3.1"
        }
      ],
      "repository": {
        "id": "1440062933",
        "source": "github",
        "url": "https://github.com/smdesai27/math-board"
      },
      "title": "Math board",
      "version": "0.3.1",
      "websiteUrl": "https://github.com/smdesai27/math-board#readme"
    }
  },
  "source": "mcp_registry",
  "summary": "A local, view-only chalkboard the model draws on: equations, plots, molecules and diagrams."
}

What the leaf hashes

{"body":"62193559d5709a6d245b2087bd80dc9121fd31660c80863762e41f0e90d96129","id":1286624,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793387737021525,"prev":733105,"subject":"mcp_registry:io.github.smdesai27/math-board","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-30 (243099 rows).

1. 0x887ebb92c8786ab9ae682e1f967d70a552ba88211d72459db0d41d82caf3cb30
2. 0x41af62c07913fe663be858cb61bb0a92d1c006a9951fc37847b690af81c78f4e
3. 0x2af16b98801f63f514865e6ecae3ca0021311e63a636cc0e3d5478ab04f082f5
4. 0x5cb5e3caa366e26677111327c94a535f6762d514155c0189afb3fbf397d959de
5. 0x32b0eb6d3a8596305451eccd7967b0620e4419b5c705d9c25ddf9e34ba913cb3
6. 0x463df0d04e3a756b026b3e8e2c8861f1b5c5573bd965bd6682914b0dcc93e84c
7. 0x09f8c50b675cf46962f551ac7b796835f4e29a9cfd16fe9e2a6884ee13132530
8. 0x6b63f79fc5042956304cae0a44392cb936cfe12e0e4c0d664c659f85b2e5d480
9. 0xa0b59e0a42039f5cb76541034af3161fc597311b214441bcd5c15d42b7e2a119
10. 0x0f7431c52bc8f1cdb6eac6deb4330101cb0e78a6f63ec2bb6018ae4541360b58
11. 0xfd1071c805c49dc072e19c7a26f66574cdecaba2a59c4db980f2fb1411d7f857
12. 0x8eecb41108b41d7fd9877004871b23203ed037d1b02052f45e85ce8808815d3d
13. 0xa0bdb5f3bd27bfda93487148c281e2998b9a5f0ec8cec2ae9b744375d5414046
14. 0x2cc23d59d659d5b819934005bab57d036b04ff4c8b701cb0e274c40aaddb2d51
15. 0x235114e50a987e65d728b9ef8b5978846cd7c01f22effc55dd604c388ce359ec
16. 0xdbaaffa44665d1fa60d33d2c4075bd87629b76d01a6ee63e621e78590303b56d
17. 0xffe660edb9e5c6e3449a49454634c3e7b2f9fe703e5697f723b021735647ab7e
18. 0x30a81d8fcef4e8f9e2877c62796cfc5612fc1b251127d531dee28f8dbd5c5147

Day root

0x0826c7ad6039e06a2360ca0a4a3a4fe7f2626c6dc19f71a37599386f78b39875

Chained

0x36b4c8a1063758f0b8765fa1bdf75fa92fb543cc183add3e261880ee2bd1f822

Published

On Arc Testnet, block 69923247: 0x8704744146c6967c8abc9e9a99de4db7283b29e840922ea83a69b6fe776e6861