Evidence row 21649

What was observed

{
  "endpoints": [
    [
      "web",
      "https://docs.usebrainchain.com/agents"
    ]
  ],
  "name": "BrainChain",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-26T13:45:59.027252Z",
        "status": "active",
        "statusChangedAt": "2026-10-26T13:45:59.027252Z",
        "updatedAt": "2026-10-26T13:45:59.027252Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Hire frontier models through Jev. Pay in USDC on Base or USDG, only for work that passes.",
      "icons": [
        {
          "mimeType": "image/svg+xml",
          "sizes": [
            "any"
          ],
          "src": "https://usebrainchain.com/brand/favicon.svg"
        }
      ],
      "name": "com.usebrainchain/brainchain",
      "packages": [
        {
          "environmentVariables": [
            {
              "description": "Private key of the wallet that pays for tasks (0x followed by 64 hex characters). Use a dedicated wallet.",
              "format": "string",
              "isRequired": true,
              "isSecret": true,
              "name": "BRAINCHAIN_PAYER_KEY"
            },
            {
              "choices": [
                "mainnet",
                "testnet"
              ],
              "default": "mainnet",
              "description": "mainnet or testnet. Testnet pays with test tokens that have no value.",
              "format": "string",
              "name": "BRAINCHAIN_NETWORK"
            },
            {
              "choices": [
                "robinhood",
                "base"
              ],
              "default": "robinhood",
              "description": "robinhood pays in USDG on Robinhood Chain after a one-time Permit2 approval; base pays in USDC on Base (Base Sepolia on testnet) with a signature alone.",
              "format": "string",
              "name": "BRAINCHAIN_PAY_ON"
            },
            {
              "default": "1000000",
              "description": "The most the server pays for one task, in the payment token's base units (6 decimals).",
              "format": "number",
              "name": "BRAINCHAIN_MAX_PRICE_UNITS"
            },
            {
              "default": "10000000",
              "description": "The most the server pays in total while it runs, in the payment token's base units (6 decimals).",
              "format": "number",
              "name": "BRAINCHAIN_BUDGET_UNITS"
            }
          ],
          "identifier": "brainchain-mcp",
          "registryBaseUrl": "https://registry.npmjs.org",
          "registryType": "npm",
          "transport": {
            "type": "stdio"
          },
          "version": "0.2.0"
        }
      ],
      "title": "BrainChain",
      "version": "0.2.0",
      "websiteUrl": "https://docs.usebrainchain.com/agents"
    }
  },
  "source": "mcp_registry",
  "summary": "Hire frontier models through Jev. Pay in USDC on Base or USDG, only for work that passes."
}

What the leaf hashes

{"body":"310575fe446e6aee443c2014469ace3b083ceb1fedd3ea87fe93a93ef1dd7c68","id":21649,"kind":"listing","method":"baseline/1","observed_us":1793025340779273,"prev":null,"subject":"mcp_registry:com.usebrainchain/brainchain","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. 0x4e501a61ed30a5e6e4459bf19b17e92f9fc8e3555f6fa41929e02d60d7be6946
2. 0x5e6c9ee273614c0405e46e762849c214d5c5f878ac1f6cbe693b91f91b622028
3. 0x1558089e2b63e6dd65f12a5cc2606d2383fa4ca46f889c52eb20cedca3f757a7
4. 0xaf041024406d86a49682c5dae4952d4674d06511a6965b164ab643425f9ed029
5. 0xddb870b6707572ddcf2f9734b463311b1b1b6cf2330087237152f52ffed47ac7
6. 0x910b26173ef4f71b45dee196e46d366d3d388cbdb41f10e70b352e749c6bee9e
7. 0x1b638450feb4c703fd1520cfd0f510ae2e51b2ac80fdc99ae0174bff89df463b
8. 0x90649b803db853c53bca7036e49ddeca07f32f7577e4564b3a9f982ad1adbe64
9. 0x65ec2c65d018d2cd6b58df339fc0f0ab50ee700eb308a8ebb898a4fb3d28e81c
10. 0x4e3a378d46fb644a540765cb2a75611ba24be0dbb514229e14d4860c2c09f3dd
11. 0x20ba86fd56bddd46212d02e792b969e90a1167c4fb9ba4a54cb7da5cf7da1629
12. 0xaf14a84837a57dc5a0cb0ebd158daaad24c19301b9257d9e97c322a7d8c54bc0
13. 0xf7d2cf278e5d2768b8bdb70730c378877cf7165d8efcbec8bcd3282fdc50d177
14. 0x0733993143f0230e79482cef2c38e95d98f9eafbe64a43cdc74a4545938a4167
15. 0x2be1e80e065dd6b2cc75a7142be22225acd144ac975d70bf24b4f01fd76dc497
16. 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae