Evidence row 406349

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://check-api.metisfoundry.com/mcp/check"
    ],
    [
      "web",
      "https://mcp.metisfoundry.com/docs"
    ]
  ],
  "name": "Metis Check",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-27T05:03:59.524448Z",
        "status": "active",
        "statusChangedAt": "2026-10-27T05:03:59.524448Z",
        "updatedAt": "2026-10-27T05:03:59.524448Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Checks an answer's citations at the registries that issue them. Every check files a signed report.",
      "name": "com.metisfoundry.check-api/metis-check",
      "remotes": [
        {
          "type": "streamable-http",
          "url": "https://check-api.metisfoundry.com/mcp/check"
        }
      ],
      "repository": {
        "source": "github",
        "url": "https://github.com/MetisFoundry/metis-plugins"
      },
      "title": "Metis Check",
      "version": "1.0.0",
      "websiteUrl": "https://mcp.metisfoundry.com/docs"
    }
  },
  "source": "mcp_registry",
  "summary": "Checks an answer's citations at the registries that issue them. Every check files a signed report."
}

What the leaf hashes

{"body":"7511c465fb5f096dd9b7d3edbe1d338000d598951d2b71a1e3fbc5ccfd814ab1","id":406349,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793080206316239,"prev":null,"subject":"mcp_registry:com.metisfoundry.check-api/metis-check","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x18747d939ad8fac36f94ed99caa6bb7e4e08dde04cd99471fcca1d88944f3a8b
2. 0x84db4497459ee8927c19de873a5124355ea31acc99c0fe11864f9648169be660
3. 0x5209c960011b93fdc138433e2ce3dc90680a0366096358e0f7db2af2834a5fcf
4. 0x090cb5785fc1a1cc4d03daa9b7266e3974421529cbaac1f09e179bfab3ffacd8
5. 0x3f2d03b9352e63b6134bba9de584162513c2088710e6d0d7bd2e9270af5bfb27
6. 0x6a8cc141017fe98568d2fc67f9baca722be0940265061f6368f6646a36dda869
7. 0x67032f2864916972d18b1ff69b63970dc17cb7fa26f57111be446b8d50f7900e
8. 0x20b08ec8b2dab06bbb1feec8484d4728ca8fe23c720ab113ef0548b303043bc7
9. 0xca12b24621fe168cf48385f22d0eda26a617e9f06d16dac78cf4e37fc26185ba
10. 0xb2c61af36f4e381bd25df0021429da8b6682607f7465069a85856784ca9840ba
11. 0x3a308d481ae12b05ff4d5f5a64f87b375db92eb3a8ef3972c9ec3311eb3e6ae7
12. 0x7afa806e5533c63e57a18fda23b38702b370e8b298a35edc0c1de641c8ffcaec
13. 0xca0b37bb3b043ccf0f24c50fccd9c2f22b7e5290df49886008fc2ff55380fdd1
14. 0x2064e3a2b01d0d12d5079bf720a0d0125e9703c55e92de54ad40c302469ec047
15. 0x6913cb48392acb8dc5c940dcdb6e6fc889d544f85dff11da249551a5f027e688
16. 0x518b93854db03dc9fc938883abf30da6eaae5ae0d4336903968fd32a7df8c71b
17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4