Evidence row 28902

What was observed

{
  "endpoints": [
    [
      "web",
      "https://a0lang.com/"
    ]
  ],
  "name": "A0",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-01T18:09:04.388183Z",
        "status": "active",
        "statusChangedAt": "2026-10-01T18:09:04.388183Z",
        "updatedAt": "2026-10-01T18:09:04.388183Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Write, check, run and compile A0 programs through revision-checked structured edits.",
      "name": "io.github.Joe-Simo/a0",
      "packages": [
        {
          "fileSha256": "ec11d1a0341fb89e9bf17ab9d6d502df5d4fe2afd2b2d57cc78cd04f47328cb5",
          "identifier": "https://github.com/Joe-Simo/a0/releases/download/v0.8.16/a0-mcp-darwin-arm64.mcpb",
          "registryType": "mcpb",
          "transport": {
            "type": "stdio"
          }
        },
        {
          "fileSha256": "905fc58960ca66a1cf7fd4064e9faf53d3e860826c2717b5dcf9716507beca7e",
          "identifier": "https://github.com/Joe-Simo/a0/releases/download/v0.8.16/a0-mcp-darwin-x64.mcpb",
          "registryType": "mcpb",
          "transport": {
            "type": "stdio"
          }
        },
        {
          "fileSha256": "fb770d4518210b5068ed685c616c491631ffd4d18ec2f7bb04ecbc0d7600027e",
          "identifier": "https://github.com/Joe-Simo/a0/releases/download/v0.8.16/a0-mcp-linux-x64.mcpb",
          "registryType": "mcpb",
          "transport": {
            "type": "stdio"
          }
        },
        {
          "fileSha256": "3707c9d48819dd94e945b00a84afbbe5b0460cb375b3020609ef10abcb02e357",
          "identifier": "https://github.com/Joe-Simo/a0/releases/download/v0.8.16/a0-mcp-linux-arm64.mcpb",
          "registryType": "mcpb",
          "transport": {
            "type": "stdio"
          }
        },
        {
          "fileSha256": "840e0f04c9a0fc945ddf426905daa5846a3820cb767b9d3f9b62a17222a5dd8c",
          "identifier": "https://github.com/Joe-Simo/a0/releases/download/v0.8.16/a0-mcp-windows-x64.mcpb",
          "registryType": "mcpb",
          "transport": {
            "type": "stdio"
          }
        }
      ],
      "repository": {
        "source": "github",
        "url": "https://github.com/Joe-Simo/a0"
      },
      "title": "A0",
      "version": "0.8.16",
      "websiteUrl": "https://a0lang.com"
    }
  },
  "source": "mcp_registry",
  "summary": "Write, check, run and compile A0 programs through revision-checked structured edits."
}

What the leaf hashes

{"body":"db81e36808f415dc42a882f24126c61fdd92fe2274442d5513ecefe96b504586","id":28902,"kind":"listing","method":"baseline/1","observed_us":1793025360322563,"prev":null,"subject":"mcp_registry:io.github.Joe-Simo/a0","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. 0xfaf1822dc4948035e4fe5f66dfbbef870e4f1a863319f42e371701f6c117e0a0
2. 0x5e7e4614957270e1b85cea9b8d36917ab1141db767f0bc3e9db79a1c6288f459
3. 0x8a1827a38ae40ccf7da0c51b81cfaf147fccac985ed50e84a7fcd121cbfaf00e
4. 0xa6b8d86c7598752560f35347dbb007109716d2c3812837c8c1ced49da8fadb79
5. 0xc6c4e94a19b4aae1c4bd2cf94b3d22b0e8694d84294da65da1af66973089dff1
6. 0x345a3109eaf487b79494df7e293c33ba73b61308071cab36df0eaef150a72c9b
7. 0x4107b7b33d2dc7be7e2b6858c96dfe452dcb76b043667f65da1397268f942568
8. 0x320165ed74d25543d26b2e14cbc3d677af37732fa5bc44d9aabacfad4b4f47be
9. 0xbfe92308f156ea6389ec1185fb208a6cf9ca58f58a39e7ccf88e8c8b244dc082
10. 0xd76f45bbfd4476d2270c8ee2682ce22ef4f12d6f8a748331c7b8b81e476c49cb
11. 0xc1f00d9dcd67fe1d14473197e5f14f3efa26c1e1569cc2a3172842f28c850633
12. 0x08d20884523152a869ac5da32efc7de7b28316f6e9c2a28242f5ea9da742852f
13. 0x694eb701ea36a0e3dcde192253ab85a618738bdc1e3a6e582e6f8bf9647f7a6a
14. 0x44945ea9ad8b24e723ad5a8fd6d014024a49531783f74ff9229c2ab6930e84c8
15. 0x68d296b1e00b4899fb83c3fba36fffaefa311eac2903067dbebfe776a12b4a9a
16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae