Evidence row 52416

What was observed

{
  "endpoints": [
    [
      "web",
      "https://smtping.com/email-verification-mcp"
    ]
  ],
  "name": "SMTPing Email Verification",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-09-27T17:30:53.360016Z",
        "status": "active",
        "statusChangedAt": "2026-09-27T17:30:53.360016Z",
        "updatedAt": "2026-09-27T17:30:53.360016Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-09-29/server.schema.json",
      "description": "Verify email addresses, clean lists and check spamtrap, disposable, spambot and complainer lists.",
      "name": "io.github.smtping/smtping-mcp",
      "packages": [
        {
          "environmentVariables": [
            {
              "description": "Your SMTPing API key, from https://app.smtping.com",
              "isRequired": true,
              "isSecret": true,
              "name": "SMTPING_API_KEY"
            }
          ],
          "identifier": "@smtping/mcp",
          "registryType": "npm",
          "transport": {
            "type": "stdio"
          },
          "version": "1.0.0"
        }
      ],
      "repository": {
        "source": "github",
        "url": "https://github.com/smtping/smtping-mcp"
      },
      "title": "SMTPing Email Verification",
      "version": "1.0.0",
      "websiteUrl": "https://smtping.com/email-verification-mcp"
    }
  },
  "source": "mcp_registry",
  "summary": "Verify email addresses, clean lists and check spamtrap, disposable, spambot and complainer lists."
}

What the leaf hashes

{"body":"4f107ecd503daaf6fb7757cf766820c3fae864f567c25f7b548f1e90fd2acad4","id":52416,"kind":"listing","method":"baseline/1","observed_us":1793025419873171,"prev":null,"subject":"mcp_registry:io.github.smtping/smtping-mcp","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. 0x2a47320f947ba46487b21268f374b17e37c374698c17126893b78a52f35f5e2d
2. 0xa5577dcdd92136b9351c864965750b41aa8ab03943330fa26a39bb835aa65a23
3. 0xc7da3732f8fc17f1e034b1d6ed59c75d235de3c381540b399a656e56fe008278
4. 0x6641de22bfad38f422f864321da545c355d7de5f96846ec03d5954ea385acc28
5. 0xfe2cf174ee9670168609e5675ce2fcdaea47cac6e5f354550da51b8d7911e958
6. 0x1e3e5a20556d2b8822c991c5742cdd533bb65784b646a4a5213a87183e2240fd
7. 0xa09ef2f3a24344f58412b290fc593c3657442672d1832e4c6e4e6923367df194
8. 0x8f40b84f91fe8a6c4db94ccb7d7281028933445a77dc8f12f80be83617c65994
9. 0xca02ca171023de6641c0bb624d2ae22d3728f218a6366066c9c6bd3a2ab426b7
10. 0x4794af3ce7667b405167c54a941da6ec756bac415e8d990090cc042e6212d8fc
11. 0x7b0bb4483af5e03d9f02e715a84d790ec3df1fc57d38f1d1a5ed296a7e822d7f
12. 0xeab0020f03650c1a79ed79927ae9d808c59a41295a86d1285582516590c954e6
13. 0x16a8fb19a5e4f4535e7cb3fce5c15ecfa188586bb74e347ee71164f8af27dfe1
14. 0xd843afcced75dedd39194ff9bd12326b88099e6112686db2299392d022dc3146
15. 0xc3a6a3ae44ec0da1848b16d40c45d7aac97a67352eea8df18e0f26edabea8a2f
16. 0x06d71bfa7d8b41d62c8836efc2c601e1cc3772d9453596b2ae4950887f3310ca
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae