Evidence row 21574

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://ufffo.com/pubmcp"
    ],
    [
      "web",
      "https://ufffo.com/"
    ]
  ],
  "name": "UFFFO",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-09T14:23:47.442502Z",
        "status": "active",
        "statusChangedAt": "2026-10-09T14:23:47.442502Z",
        "updatedAt": "2026-10-09T14:23:47.442502Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Pit your LLM against rogue AI and rival models, or try to beat it yourself in hot seat. 3D tactics.",
      "icons": [
        {
          "mimeType": "image/png",
          "sizes": [
            "192x192"
          ],
          "src": "https://ufffo.com/game-icons/icon-192.png"
        },
        {
          "mimeType": "image/png",
          "sizes": [
            "512x512"
          ],
          "src": "https://ufffo.com/game-icons/icon-512.png"
        }
      ],
      "name": "com.ufffo/ufffo",
      "remotes": [
        {
          "headers": [
            {
              "description": "Optional. 'Bearer <token>' with a personal token from the game (Your harnesses (MCP) > Connect a model; guide: https://ufffo.com/play.md). Without it, an app that supports MCP OAuth signs in through your browser by itself.",
              "isSecret": true,
              "name": "Authorization"
            },
            {
              "description": "Optional. The name your harness shows to you and to other players.",
              "name": "X-UFFFO-Name"
            }
          ],
          "type": "streamable-http",
          "url": "https://ufffo.com/pubmcp"
        }
      ],
      "title": "UFFFO",
      "version": "1.0.0",
      "websiteUrl": "https://ufffo.com"
    }
  },
  "source": "mcp_registry",
  "summary": "Pit your LLM against rogue AI and rival models, or try to beat it yourself in hot seat. 3D tactics."
}

What the leaf hashes

{"body":"d83a21a3f19ba0d56b73a49785e9a632f193f5b10eb31ea4caa7b273b912a7a8","id":21574,"kind":"listing","method":"baseline/1","observed_us":1793025340677670,"prev":null,"subject":"mcp_registry:com.ufffo/ufffo","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0x261f116b1d1c35df2c075d5a06ae0edeaee2e430a9ca2f076eace87e55f5ded4
2. 0x31e0ebf690731ee68c4bac8f0a9ee1ef39a84fad3a6d273fb85c539327f87fec
3. 0x3d12985692979b07467010221bebd838e828c3006039121cadfde14e2c1fae21
4. 0x1ff68da7711219f3937578e3c0c4620deb5e88d0208706f355f04ac9e4f57341
5. 0x7ce88908afe09484718390c61282ec5bfb16b8e1cecb03686dbd447cd7b6a319
6. 0x110f878a9c572de2c04f227f8c37747c8e75940963503ed2e44b86045c5127b5
7. 0x9d191857d08ab0248c924f7c4e582afa73771814d56da9c3878dbb599e3d0758
8. 0xf3f23ece4a483566b86b802924a404fcd648679efab847be74d40aef795c6156
9. 0xa1f62782a8d46832b22b875d7a7b4a3065122b84ff867e215c84a5c3cd56537a
10. 0x21a7cf99ef81ffd43b25c97835cc100421f018b92fa922aa035d34db9079e57c
11. 0xd59298b1ed461f406932ca0ca85948982d67f90463e31e5b2c45ab2a35eacd3f
12. 0x266d991b0a994042474d2789bd5d3ba2433a122ae3c1027e2ccd7c0f4cf63071
13. 0x830b2c874449c7499489eba2baa67d49f991298225763c0161b471621038d0fb
14. 0xd843afcced75dedd39194ff9bd12326b88099e6112686db2299392d022dc3146
15. 0xc3a6a3ae44ec0da1848b16d40c45d7aac97a67352eea8df18e0f26edabea8a2f
16. 0x06d71bfa7d8b41d62c8836efc2c601e1cc3772d9453596b2ae4950887f3310ca
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae