Evidence row 48206

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://quadratikmcp-production.up.railway.app/"
    ],
    [
      "web",
      "https://quadratik.com/"
    ]
  ],
  "name": "Quadratik",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-04-17T00:20:22.865454Z",
        "status": "active",
        "statusChangedAt": "2026-04-17T00:20:22.865454Z",
        "updatedAt": "2026-04-17T00:20:22.865454Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Search and manage 220M+ B2B contacts. Filter by title, industry, location, and more.",
      "name": "io.github.quadratik-ai/quadratik",
      "remotes": [
        {
          "headers": [
            {
              "description": "Your Quadratik API key. Get one at https://quadratik.com → Account Settings → API Keys. Optional for searching (results will have masked emails/phones), required for saving, exporting, and list management.",
              "isSecret": true,
              "name": "X-API-Key"
            }
          ],
          "type": "streamable-http",
          "url": "https://quadratikmcp-production.up.railway.app/"
        }
      ],
      "repository": {
        "source": "github",
        "url": "https://github.com/quadratik-ai/quadratik"
      },
      "title": "Quadratik",
      "version": "1.0.0",
      "websiteUrl": "https://quadratik.com"
    }
  },
  "source": "mcp_registry",
  "summary": "Search and manage 220M+ B2B contacts. Filter by title, industry, location, and more."
}

What the leaf hashes

{"body":"b7e1efc058f500f871759c320cb5608193ca997788a12a7da76cc51e56cab248","id":48206,"kind":"listing","method":"baseline/1","observed_us":1793025411479274,"prev":null,"subject":"mcp_registry:io.github.quadratik-ai/quadratik","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. 0x66f87cf47bcff2f5e1787a22f34f585ae4845f4cf99183af2aa0fe8f48b7fea7
2. 0xec559974ebb21815d1d1f15c9b34a906b27a61add4c643c5a19669453b5a53ab
3. 0x3699ee51be04d72deb0ba206f51fddb53d719e42019108257e12e46f9690a8b2
4. 0x38420de9a8c85028aed1954cb321a1d0b5b8cc4ad3acab8652cc3684829c850c
5. 0xf3f348f6e2cbdf25d8c47213a046e47e56b1c1778977a9a32e25429f6fa3fcd2
6. 0xbc18cecb895454617d8f8fbd8176e4e23692d6c6c5bc01583365bd214ae404d6
7. 0x1c2f9e80e8cd6decc37273cf68fd6aef48fa015e6d34e0706275554a4aae6c79
8. 0x4c5ecdd19fad33fd8ba089c5730128c1dcc3bae61ee7d76c6118c304ad331665
9. 0x39d055f1a5898b25bdcfd8aa904cd619413462803f89fae9558b66148b215879
10. 0x1532666d1a6a9b626e54c3e93335a185ec833ad947243bdea3c723654b68d9f4
11. 0x13951c97c827e2025801573dada28cfb5f8038c9b4de741f9d526cb67b3fe605
12. 0x260682fd6ecd274e73505c5e0bd798abdd0e702afca4f8eebd4331b607a6b175
13. 0x5f350d70c252ff1169c0210fd45fce1b0ab8d7316f048741a9e90a6c8cb65dcf
14. 0x9a79c65e077cd9da9d436b3ade6f5ddc0d244510c4d5903ef2f02d81205f7666
15. 0xa2d436d488e3600b0e5c3e3ed9c9234cd52853c59830b786334fd0c4292d9f40
16. 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae