Evidence row 495490

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://mcp.live.nevermined.app/mcp"
    ],
    [
      "web",
      "https://nevermined.ai/docs/products/catalog/mcp"
    ]
  ],
  "name": "Nevermined Catalog",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-27T14:02:54.378117Z",
        "status": "active",
        "statusChangedAt": "2026-10-27T14:02:54.378117Z",
        "updatedAt": "2026-10-27T14:02:54.378117Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "_meta": {
        "io.modelcontextprotocol.registry/publisher-provided": {
          "documentation": "https://nevermined.ai/docs/products/catalog/mcp",
          "keywords": [
            "catalog",
            "commerce",
            "payments",
            "x402",
            "mpp"
          ],
          "publisher": "Nevermined"
        }
      },
      "description": "Discover and pay for services from the Nevermined Catalog using a spend-capped budget.",
      "icons": [
        {
          "mimeType": "image/png",
          "src": "https://nevermined.app/favicon.png"
        }
      ],
      "name": "io.github.nevermined-io/catalog",
      "remotes": [
        {
          "headers": [
            {
              "description": "Optional Nevermined API key in the form 'Bearer <key>'. OAuth-capable clients can omit it.",
              "format": "string",
              "isSecret": true,
              "name": "Authorization",
              "placeholder": "Bearer live:..."
            }
          ],
          "type": "streamable-http",
          "url": "https://mcp.live.nevermined.app/mcp"
        }
      ],
      "repository": {
        "id": "946485192",
        "source": "github",
        "subfolder": "apps/mcp",
        "url": "https://github.com/nevermined-io/nvm-monorepo"
      },
      "title": "Nevermined Catalog",
      "version": "1.86.1",
      "websiteUrl": "https://nevermined.ai/docs/products/catalog/mcp"
    }
  },
  "source": "mcp_registry",
  "summary": "Discover and pay for services from the Nevermined Catalog using a spend-capped budget."
}

What the leaf hashes

{"body":"4784992d2ccdff48aedba42d7c73d6e215a1d450d1fac3fde728a4b08d9b742b","id":495490,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793111341705646,"prev":44543,"subject":"mcp_registry:io.github.nevermined-io/catalog","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. 0x70e89f0f9319841f8ede627400ef39edbc32dddc70e68448b35b12c087b2933b
2. 0x82b0d17041b03b2122c2ce0015c73cd41bfd3b886d577267473996cea6cecabf
3. 0x24edb52275971661c8663081ccd6c292e813556b461cf304e3ef45ef57b433be
4. 0x3eed7852909e1de80de0d18bc1073efa14f0688c736c6500c2aa13cf1a21e546
5. 0xed26060254c10cd527ea147f88335ba775cbb11e486ca318c6a42ea68d346062
6. 0x3a36d8ffe39043115adfffcbf77202379be90311b8fb05816ee83d327e0124fe
7. 0x3aa7cd2e95c46d8d57a383bbddca555a894f8e84249128a778698846731cef1f
8. 0x1005334f457a55a37a682f87fa8171c81e1264fe084893794cd3b8e81e3c243d
9. 0xba140535f6e18ceb43e0655b3faf1c067bfe29646771645cc88f653528d3afeb
10. 0x02b55bab59340b62675e0dca5f5a37860557b1384e60340fe5afdef2a3f65d9f
11. 0x95c0df7fc0477722ad83a4634b422a1cfaabb7e80a9eb5e4018684b65fb2f9b6
12. 0x4150865dc22c5026ab3aaed78166c00f6d1d55d60deb27596b675ffe296e1e81
13. 0x2926e99aefa0ff2e14a67a3ae10a7f6e753ce4b799c6fe531f8cbf8d33b31a66
14. 0xb2ae53d841a55a805fb4078b1a7d44e08a81aba4be3690bac3a5b4c366bf39da
15. 0x275720ecabb68df33eee92ae4fd70572a8d952d6c61c061c2869cfc3217aa5c5
16. 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4