Evidence row 22691

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://costheta.dev/mcp"
    ],
    [
      "web",
      "https://costheta.dev/"
    ]
  ],
  "name": "costheta",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-08-12T08:20:11.052457Z",
        "status": "active",
        "statusChangedAt": "2026-08-12T08:20:11.052457Z",
        "updatedAt": "2026-08-12T08:20:11.052457Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "_meta": {
        "io.modelcontextprotocol.registry/publisher-provided": {
          "full_description": "Verifiable physical randomness from cosmic-ray muon detections. Seal your options as a hash, the next detected muon determines the outcome, receive a certificate dual-signed with Ed25519 and ML-DSA. Free public beacon; paid decisions settled per call via x402 in USDC, no account or API key. Throughput is bounded by physics: about one event every few seconds. Not for cryptographic key material. The certificate format supports multi-node attestation; the federation protocol is published as an open proposal. Today: one detector, one operator, one attestation per certificate.",
          "tool_descriptions": {
            "costheta_decide": "Paid commit-and-reveal decision. Send a hash of your options; the next detected muon selects one and you receive a publicly verifiable, dual-signed certificate binding your commitment to that physical event. Latency up to ~30 s. $0.02 via x402/USDC.",
            "costheta_random": "Free public beacon. Random bits derived from muon arrival timestamps on the latest signed pulse. Shared by all callers until the next muon arrives; for private, request-bound outcomes use costheta_decide. Not for cryptographic keys.",
            "costheta_witness": "Paid timestamp attestation. Binds any hash you send to the next detected muon and signs the pair: a timestamp anchored to a physical detection, not a server clock. $0.02 via x402/USDC."
          }
        }
      },
      "description": "Verifiable physical randomness from cosmic-ray detections. Free beacon, paid signed decisions.",
      "name": "dev.costheta/costheta",
      "remotes": [
        {
          "type": "streamable-http",
          "url": "https://costheta.dev/mcp"
        }
      ],
      "repository": {
        "source": "github",
        "url": "https://github.com/costhetadev/costheta-verify"
      },
      "title": "costheta",
      "version": "0.1.0",
      "websiteUrl": "https://costheta.dev"
    }
  },
  "source": "mcp_registry",
  "summary": "Verifiable physical randomness from cosmic-ray detections. Free beacon, paid signed decisions."
}

What the leaf hashes

{"body":"c471820dae03698be652151fb8b4cf62575ef88f50cc59439ec647f3d7cdac32","id":22691,"kind":"listing","method":"baseline/1","observed_us":1793025349591563,"prev":null,"subject":"mcp_registry:dev.costheta/costheta","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. 0xaffb4a14857a9f6cd7ba617e9382cdd0e5860c41a19915c8eac166c1f0f34ae5
2. 0xa0701d596e5b4a425f9f8b6a36e15a0fdd6be02d35e946a2fa2db121f70719bd
3. 0x073c019636aca8b57395cf84d73bef31da3c17dfd4abd199bf1db83dfd6815be
4. 0x9908423d2206b19f2380d99f0bf00b5758cf0e22c76300b1417b0445f73330d3
5. 0xa0bd6740265a988e2b6a06c10fed72499995b6639430952fc8cd2225bcdb103b
6. 0xcba77d3b01b38abaebe3c048495c268562683bd9e11ae8f25e7ac15336708cc7
7. 0x4806d2eb6993d3ff6dfce224ce6147b5f93d7d216b0b8a49740de53b90cda144
8. 0x8ecb8a2a82ac1cdbe71dadcceb250f92a19f382dcdd89f784e7e4fca6249fe8a
9. 0x093577cc3103152dbae7a3e2746efa7cf14907771bf3a1d81b476910716da144
10. 0x88e14554875d47fe3e9d547b6e116a59cb4b1bba1165fecb62ab9dc0789b5291
11. 0x3bebef69be15ae49fdf78639d05bdb957a983cd3565294a33f1d0a8a41913db8
12. 0xd17258d4f01d074dcaf38f36218b36058144c3d50c3b488953a815c54d6674d2
13. 0xe292b5a99219f136bce6647ce74b21240a1c7331d2475b1839220fd363c94217
14. 0x3b4dba7d874fc323b0a364140a9c60f37bf547fe671897653118a9873fe03420
15. 0x1a74ed3b3756b9cd946da49701bcec120ec88645013da99fa9eea60b39e1a570
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae