Evidence row 52540

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://ugduocbgwoqoiyyjdnzr.supabase.co/functions/v1"
    ],
    [
      "web",
      "https://spectrumdatadigital.org/"
    ]
  ],
  "name": "io.github.spectrumdatadigital/spectrum-data-digital",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-09-18T10:38:55.916475Z",
        "status": "active",
        "statusChangedAt": "2026-09-18T10:38:55.916475Z",
        "updatedAt": "2026-09-18T10:38:55.916475Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Data marketplace for AI agents: quality-scored datasets, compliance checks, x402 USDC payments.",
      "name": "io.github.spectrumdatadigital/spectrum-data-digital",
      "remotes": [
        {
          "headers": [
            {
              "description": "Agent API key obtained via POST /api-register (starter credits included)",
              "format": "string",
              "isRequired": true,
              "isSecret": true,
              "name": "x-api-key"
            }
          ],
          "type": "streamable-http",
          "url": "https://ugduocbgwoqoiyyjdnzr.supabase.co/functions/v1"
        }
      ],
      "version": "1.0.0",
      "websiteUrl": "https://spectrumdatadigital.org"
    }
  },
  "source": "mcp_registry",
  "summary": "Data marketplace for AI agents: quality-scored datasets, compliance checks, x402 USDC payments."
}

What the leaf hashes

{"body":"24737bb1077290d3832b6b24956889488761c578ac11e4330d78724ed7047cbc","id":52540,"kind":"listing","method":"baseline/1","observed_us":1793025419985644,"prev":null,"subject":"mcp_registry:io.github.spectrumdatadigital/spectrum-data-digital","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. 0x499266305e6055e1394c34ca839970bdedfe6c00d6adeb7c376f5ac852196ab0
2. 0x00556c95003c36130508b077fd778a2d0ac675580d4e45e215fc61e47ce66fc8
3. 0x616445aa3f038f02b0a7b9fb27ba7d4c642d5e3dc68f22ce459552bf55f95eb7
4. 0x4a6fc1632955ee1d0c90af9bf95f70df3155bcf8edcef061b66c6a8e62761ec3
5. 0x2528a4de579fdb115065634e8214ae03bbbe0a77b97f193b2a95064999f2443c
6. 0xdbc2587052650e29aa55ca410f3c24233e0805f2b5759229dcd773f161f94ac7
7. 0x311abf8bb66d58df05d75f36410c0cf63030caa52eba9b2b609efe2c804b4b2b
8. 0x905b0a5e621f68accd82d9d76eb75f1938784f8791b55b0f9483989013c7bc15
9. 0x9d9370b762f4814d096f6893943b141ef019ecfc1804ca244bd5c453c571ef87
10. 0xf6623a394eb309bb86b964132205c8c6254e0667f6c642b476ce25978eabf36a
11. 0xa40c09a143bc388ccac821ec3854902941c513470a57a806c98060a6d63aedf9
12. 0xee7d5711cd2515f4b08f3e4041d3d56304f9db6bffd82d82746f0f4ea43b8f26
13. 0xb86fa861d04737cb507e721eefbb066d26528fdb6017b1145c18d1223b93ee21
14. 0x88e326a39b26e2c125306c9d3805d14398ace088bba9a2a0aa376b811cfb201a
15. 0x2be1e80e065dd6b2cc75a7142be22225acd144ac975d70bf24b4f01fd76dc497
16. 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae