addrbookFor publishers
← The evidence ledger

Evidence row 58829

Observed , by baseline/1.

Kind
listing
About
source_record mcp_registry:sh.alchemylab.horizon/briefing
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
3963ae8a6dc491b3face25e43e0f793d825b63664ba723a6c8d5c710027bf39c
Leaf
0x8d6e198823308f38fe61bf3ae45af334813b8f421151489e66d26ea993aa9aa8

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://horizon.alchemylab.sh/api/mcp"
    ],
    [
      "web",
      "https://horizon.alchemylab.sh/"
    ]
  ],
  "name": "Horizon: AI News & AI Regulation Tracker",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-24T00:20:11.320933Z",
        "status": "active",
        "statusChangedAt": "2026-10-24T00:20:11.320933Z",
        "updatedAt": "2026-10-24T00:20:11.320933Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Free, no-key AI news + AI regulation tracker MCP: EU AI Act, US federal & state, UK. Daily briefing.",
      "name": "sh.alchemylab.horizon/briefing",
      "remotes": [
        {
          "type": "streamable-http",
          "url": "https://horizon.alchemylab.sh/api/mcp"
        }
      ],
      "title": "Horizon: AI News & AI Regulation Tracker",
      "version": "1.2.0",
      "websiteUrl": "https://horizon.alchemylab.sh"
    }
  },
  "source": "mcp_registry",
  "summary": "Free, no-key AI news + AI regulation tracker MCP: EU AI Act, US federal & state, UK. Daily briefing."
}

What the leaf hashes

{"body":"3963ae8a6dc491b3face25e43e0f793d825b63664ba723a6c8d5c710027bf39c","id":58829,"kind":"listing","method":"baseline/1","observed_us":1793025444831499,"prev":null,"subject":"mcp_registry:sh.alchemylab.horizon/briefing","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).

  1. 0x8d6e17fbb912f029e8b90194396d9c60592a02a9e1bbd4f6b2346d709b99f974
  2. 0xbe4238c0e78f00a0c1f30778159a6dbdf3b00b53cfd611e432487cdcc6fcda5a
  3. 0xf5415288919488f2e40a7cf04dfd969576e24b5dcab28d05000497251a90c161
  4. 0xb74129f1bca5e69def4560990ba8caf49901729d44c66e3440b2a44d1d69d1da
  5. 0xeee64840d02db64a6c7aacd868b09004f0436e2f8cc48e7301f48799a0b6eac0
  6. 0xed829ad1e2285ef304835681b1af0f4f635c1a24dc389ccb31e4012935b956e8
  7. 0xc07206b3da6492f95eba0a5698dcac74055cc5bccb01a9d30270a91d00db9655
  8. 0xe9e2a69fd7fdb762e320d3f9f5d8eca6f0c91162ed67af93de981a1378b13449
  9. 0x8740340a24cd78c9870cdf4d30c6018249d97da848721d4b77f04b138a763dc9
  10. 0x57adb884aa6187c9e7f153cc992251efcdbefadc60f2e9d6a2c0a9c60d412203
  11. 0x6880847de0a4b4b8c14408244df84ff11ac20d4049a575846d0700a7a91132ca
  12. 0x59a4efa65a01e4e2abdb3b8b7bb673db6d1c72e0f9d52dd2f94777b14a5b061c
  13. 0xc0cb184c9bdf71abcf18fda97bd59289153d120dbf8fee9f517b63bf303deb95
  14. 0xf0edabbb9ba0d643e5505d19d07637eb6f6aed0a1c7356af43ae7d84ae9ef0c5
  15. 0xf0bd63870f0bb378fa300bd33563050dcb7b3e02b44eb3ee550c1c534ec4b246
  16. 0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
  17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
  18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
  19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON