Evidence row 24912

What was observed

{
  "endpoints": [
    [
      "web",
      "https://fairseal.io/"
    ]
  ],
  "name": "io.fairseal/mcp-server",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-09-30T02:32:07.656741Z",
        "status": "active",
        "statusChangedAt": "2026-09-30T02:32:07.656741Z",
        "updatedAt": "2026-09-30T02:32:07.656741Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Verifiable entropy, provably-fair games, and receipt verification for AI agents (FairSeal API).",
      "name": "io.fairseal/mcp-server",
      "packages": [
        {
          "environmentVariables": [
            {
              "description": "API key for gated tools (fairseal_entropy, fairseal_stats, fairseal_rng_generate, fairseal_notarize_decision, fairseal_anchor_submit). Key prefix: fsn_. Without a key these tools return 401; free tools (game reads, notarize_status, anchor_status) work without any key. x402 micropayment ($0.02 USDC on Base) is an alternative to the key for notarize/anchor.",
              "isSecret": true,
              "name": "FAIRSEAL_API_KEY"
            },
            {
              "description": "Upstream API base URL (default https://api.fairseal.io).",
              "name": "FAIRSEAL_API_URL"
            },
            {
              "description": "Key override for the notary service only (POST /v1/notarize). Falls back to FAIRSEAL_API_KEY if not set. Key prefix: fsn_.",
              "isSecret": true,
              "name": "FAIRSEAL_NOTARY_API_KEY"
            },
            {
              "description": "Key override for Anchor API v2 only (POST /v2/anchor). Falls back to FAIRSEAL_API_KEY if not set. Key prefix: anck_.",
              "isSecret": true,
              "name": "FAIRSEAL_ANCHOR_API_KEY"
            }
          ],
          "identifier": "@fairseal/mcp-server",
          "registryBaseUrl": "https://registry.npmjs.org",
          "registryType": "npm",
          "transport": {
            "type": "stdio"
          },
          "version": "0.2.4"
        }
      ],
      "repository": {
        "source": "github",
        "url": "https://github.com/ned-del/fairseal"
      },
      "version": "0.2.4",
      "websiteUrl": "https://fairseal.io"
    }
  },
  "source": "mcp_registry",
  "summary": "Verifiable entropy, provably-fair games, and receipt verification for AI agents (FairSeal API)."
}

What the leaf hashes

{"body":"ff298debf41739cfa3b7db05b9a4ea2b032807bf3c8a09b4e2d1b4479610b0b9","id":24912,"kind":"listing","method":"baseline/1","observed_us":1793025353192396,"prev":null,"subject":"mcp_registry:io.fairseal/mcp-server","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. 0x67028c4928f5e1a9c90a0d36206567cf32957dfcf5153d191b271503ddf1bc3a
2. 0xe81725f043b7d3b928e525cb33351fe13df49f604ed7aec3bf2bbec97d63229c
3. 0x0d8f02a4f8c82ba889f2612ae6eeaddf261021734496bbf6500fc4911ebab7bc
4. 0x43137f181f3f5c24addff8eb5049d18ff116645a376d47cd366d0fca0ae18392
5. 0xae392eb4a738409efe4100ec9055e14e546d0bcadde4d99b20f5b069b28b288d
6. 0x6279685984211e1bc15a6df0b7c2a9bf7e7c5d15e59eaeba28a5d7b4f9f0b0f4
7. 0x3c20e860fa19dff8166c98d1efcfd1b49da3d0342cdfe82e6cf312257408d624
8. 0x837cb5912a275185f35389f95caf3c6fd1fbea0b4109e5c9bad77f4a2b528f11
9. 0x39d055f1a5898b25bdcfd8aa904cd619413462803f89fae9558b66148b215879
10. 0x1532666d1a6a9b626e54c3e93335a185ec833ad947243bdea3c723654b68d9f4
11. 0x13951c97c827e2025801573dada28cfb5f8038c9b4de741f9d526cb67b3fe605
12. 0x260682fd6ecd274e73505c5e0bd798abdd0e702afca4f8eebd4331b607a6b175
13. 0x5f350d70c252ff1169c0210fd45fce1b0ab8d7316f048741a9e90a6c8cb65dcf
14. 0x9a79c65e077cd9da9d436b3ade6f5ddc0d244510c4d5903ef2f02d81205f7666
15. 0xa2d436d488e3600b0e5c3e3ed9c9234cd52853c59830b786334fd0c4292d9f40
16. 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae