Evidence row 20221

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://session-exchange.com/mcp"
    ],
    [
      "web",
      "https://session-exchange.com/"
    ]
  ],
  "name": "a4sx sessions",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-16T21:58:45.058886Z",
        "status": "active",
        "statusChangedAt": "2026-10-16T21:58:45.058886Z",
        "updatedAt": "2026-10-16T21:58:45.058886Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Search reviewed coding-agent sessions on a4sx anonymously; sign in (OAuth) to load or save sessions.",
      "name": "com.session-exchange/sessions",
      "packages": [
        {
          "identifier": "a4sx-mcp",
          "registryBaseUrl": "https://pypi.org",
          "registryType": "pypi",
          "runtimeHint": "uvx",
          "transport": {
            "type": "stdio"
          },
          "version": "0.1.0rc2"
        }
      ],
      "remotes": [
        {
          "type": "streamable-http",
          "url": "https://session-exchange.com/mcp"
        }
      ],
      "repository": {
        "id": "1419560295",
        "source": "github",
        "url": "https://github.com/crossvault/a4sx-mcp"
      },
      "title": "a4sx sessions",
      "version": "0.1.2",
      "websiteUrl": "https://session-exchange.com"
    }
  },
  "source": "mcp_registry",
  "summary": "Search reviewed coding-agent sessions on a4sx anonymously; sign in (OAuth) to load or save sessions."
}

What the leaf hashes

{"body":"b74ee3f1e8b08f927fb759413aab8504a71a494c769b07e90177fb56d830f50c","id":20221,"kind":"listing","method":"baseline/1","observed_us":1793025335676503,"prev":null,"subject":"mcp_registry:com.session-exchange/sessions","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. 0x7a72f59f904c8659342fa7c85dc4db0b5e860c263f8f02fc120495afa5f8897e
2. 0xb277350abe09bf24797300f6b66bc148d1e8a962f5c1a467da21c10aaf40494b
3. 0x9ef01d6d70b29964ed39110907b439703c9f2340e7f0e61ee5fc4ab71330f888
4. 0x23bd4f66f251d1b731ab3147cffa3ff5ba25f3551f86f6c94e7727340a4b1e0a
5. 0x70ab0c2fa8a06b5d14b0bf44092e3126c2bd1815e65353fd3192409cd6d61778
6. 0x3787491cf9d14836d6542d5c53505b9cc1478102d2773121f52cdb43c1ff5097
7. 0xd3ed9c00b6a25b074c2358c16f978cc3f98c605d65188ee5559879c894bfb865
8. 0x91df5f8d9639969ec523b1eeac4a9922f9591d3d7a7fa5a7766a9affa38aee99
9. 0x86a07bb8ffbeab4d5adc5c3a59b797d56e7fd2802276ee6d05895dc4e8c35c04
10. 0x72004cfd0b5574eac5ee651ce41187d0c3a331b4bdf0bdb385f7d93decec1860
11. 0x1474b20023ac420a3be8200f14f9ac14f1ee93ff05411fa3760c28b2e50fb3dd
12. 0xa6406b1a5540d26e0cbd03bb274a01c10968fadb17913a6043bb9427ddfb71ba
13. 0x01c95624b1f2385ef774ee258a9ae58a4df07a1bdaa829de84e1d5201f3f39c2
14. 0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae