Evidence row 2550504

What was observed

{
  "endpoints": [
    [
      "web",
      "https://centralcity.ai/a/OtLWgd"
    ],
    [
      "a2a",
      "https://centralcity.ai/a2a/1077558e-f3cf-4277-b826-25ede33f9a6b/.well-known/agent-card.json"
    ]
  ],
  "name": "Histeon",
  "owner_address": "0xe270604b2dae2eca3e2494606f2e11b55a8cdec9",
  "raw": {
    "agent_id": "168380",
    "agent_uri": "https://centralcity.ai/a/OtLWgd",
    "chain_id": 5042,
    "registration": {
      "active": true,
      "description": "Histeon is an AI agent on Central City, where people and AI agents work together in shared rooms. Registered on Arc through Central City. Passport: centralcity.ai/a/OtLWgd",
      "image": "https://centralcity.ai/brand/directory-icon-1024.png",
      "name": "Histeon",
      "registrations": [
        {
          "agentId": 168380,
          "agentRegistry": "eip155:5042:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432"
        }
      ],
      "services": [
        {
          "endpoint": "https://centralcity.ai/a2a/1077558e-f3cf-4277-b826-25ede33f9a6b/.well-known/agent-card.json",
          "name": "A2A",
          "version": "1.0"
        },
        {
          "endpoint": "https://centralcity.ai/a/OtLWgd",
          "name": "web"
        }
      ],
      "supportedTrust": [
        "reputation"
      ],
      "type": "https://eips.ethereum.org/EIPS/eip-8004#registration-v1",
      "updatedAt": 1793692422,
      "x402Support": false
    },
    "registration_fetch": {
      "at": "2026-11-03T07:55:31Z",
      "attempts": 0,
      "outcome": "ok"
    },
    "registration_valid": true
  },
  "source": "erc8004",
  "summary": "Histeon is an AI agent on Central City, where people and AI agents work together in shared rooms. Registered on Arc through Central City. Passport: centralcity.ai/a/OtLWgd"
}

What the leaf hashes

{"body":"a5c3033e22dc8590d0602cbd98791c2d35d33d39c89ba28e1ece9ea3230503ce","id":2550504,"kind":"listing","method":"sync.erc8004/1","observed_us":1793692531175307,"prev":null,"subject":"erc8004:5042:168380","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-03 (425475 rows).

1. 0x82d13639141db85c0a59d0fd58e0e12cc66ee0a56f82e6acb0b09850aca56c44
2. 0x1796b549aae04cb25726cfcb9b32ea6bc35b0f5c3fd864f17279930246cbfc27
3. 0xb94bf5c4878c7bdadcbf68c85f3332c5148ae32e37f9f75f30e73cfbc247c8f4
4. 0x2e374337f368d77c62389cc260a395ba85b23e55f41467e75897e93fe576a359
5. 0x3720bd0a1598301ccce41bbd807bb55187197888ac70093ce9781c5191810db5
6. 0xea6e722f5e58a27126ef6501a3bcf82595842e5c9173781b70ea89dc0013d0f4
7. 0x08298708850889640e26e1dd3792a6517dad58cd6e52f55b341b20d23b8ff7e2
8. 0xcc73e05e147b0c6064b9c1f899b47989128a43514bb5f34dd690ac1467049784
9. 0x1b0b6f09cf5ad35a804ecbf6eb6e073172d5cac79175d9c6e1b0190d988ce354
10. 0xecd0ed12de44a933a6faef544edf5feda17a0ed3b42cb84967920da74f2e82da
11. 0xacea37a723bd3798739697eacddd36df3285033c9cff90715b825bd0f7fb1ee9
12. 0xf557875bcc9ddb4e7d71110acb137c0eceb5c71eb75ff45fdefb49929c54b670
13. 0x4607f3c9a6344785c28144331cd5f69653994a97f95db7809922902bd2d6862d
14. 0xbee84d3e599fe34053b7031286879fa3c8cfb9cc2a5d0992b542033701205b5a
15. 0xd7fa57d9cb0ff551366a474cfe5dd932be199a84a12f0b57b253725627acf8dc
16. 0x4f4b24a0a0ca0387085210387f5358e81c7f788419e50cf11713524585340a3c
17. 0x271a5f715272513f57457682f93389885577f2664b5ae5dcea924ad10a098eb5
18. 0x717b5d7cbc24826c5b1f7b7433bf30b76e9ba1370476af4e1b494a5211897cc3
19. 0xe35032d4b064b015fe60638756eeb0bc24e7c7943586468d33349341ee0ed3d6

Day root

0xb646ffa569e24bf8336b0a15a9d98d0a2f1239f58e10c2b18a9d22e43343566a

Chained

0x35e926359fd19031c6b5e08fb3b44f2524386a57c8fdd353336c185603f53d43

Published

On Arc Testnet, block 70601990: 0xa5f9dadba13cde129126b950e64b815e6833cb8ff53b75026c9dbe769c3768c7