Evidence row 515954

What was observed

{
  "count": 1,
  "tools": [
    {
      "description": "Check a page's real Core Web Vitals: Google's Chrome UX Report field data (real users, 28-day window) plus a live Lighthouse lab run. Returns good/needs-improvement/poor ratings for LCP, INP, and CLS per Google's own published thresholds, and whether the page passes the actual ranking-signal bar. Call this before telling someone a page performs well. Pass a Pro API key as a Bearer token for 500 checks/minute; see /docs for monitoring multiple URLs with daily regression alerts.",
      "inputSchema": {
        "properties": {
          "url": {
            "description": "Page to check",
            "type": "string"
          }
        },
        "required": [
          "url"
        ],
        "type": "object"
      },
      "name": "check_vitals"
    }
  ]
}

What the leaf hashes

{"body":"a304fb0156970ee3708a598109c24bba6dc8f635a3114f574c65a70e8692d51c","id":515954,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793120343265527,"prev":null,"subject":"441bec53-d8bb-47ef-858a-1b428f199f0b","subject_kind":"endpoint"}

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. 0xcb8ec9e8f5e603c9026c0f2de84d7ec4ebd09e346ffb0b6e210f0d561aab21af
2. 0x434bcc157eeca795338949a24d3ffc56eaf0e99c711004706dd3608665db5a4e
3. 0x8a0c0f48ec751b19a0383c1273bcf5d13a904d187c9730eb35cc1c2d9a3a4b9e
4. 0x3e288fb283ee818f992a4aeb07c6352a515f30b24d09ab2d99bfdc7a38bd36cc
5. 0x313674577edaba90051c1e3ef24d797ec19355b391e34bbeedad88ed5ae58d7f
6. 0xcdfc8b90941dadf8d3c92437b4d08133f28d2338bd1a40aa7b0c8f92606b014c
7. 0xeaf8282820ceab468b624361d72a993133d9add3ac8fb02ac314043b27c104b3
8. 0xc3c1bc600a3465688634f6aa1fd36623a40dcf8126a96c71d1d60f926aa26aa0
9. 0x65705fd330075d3a2fbe3396a79654fc46885a685dc8e0f145551bb103a5e720
10. 0x01329e374a465f6254ae074b3ab3a888ae0012f8c291524f049222391a97344e
11. 0x95fd8dbb624ecc6822c359ba43d046675a49c3d9c33da7908f9d847fea4eb0f8
12. 0x7142f07ffeddbd14ceabecb9ab27a468e9ab58a2fca5472c5c6a93f3e98f173e
13. 0x938752e9acd199cd15f468392bc2dd8eefc52293e7144e30b87b241ca6b2513b
14. 0xcc49fd573532e5a29f5be4033f62a2eff71456c020bd2258312b98e95cfe301e
15. 0x969cd44e5a4e8dc3110540398fbf689659eb51df735c1cda5d8f021ef9ff5683
16. 0xa94627de1af0e823832e05a9069b304ecccb8c0cdb8f9cfc4f2039bfb9799dc5
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4