Evidence row 527689

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://ask.singitai.app/v1/audio/speech"
    ]
  ],
  "name": "SingIt Text to Speech",
  "owner_address": "0xc23d1dc0f5fce1abffb051e06cb93f0329968b4e",
  "raw": {
    "accepts": [
      {
        "amount": "1082",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xC23d1Dc0f5fCe1abfFB051e06cB93f0329968B4e",
        "scheme": "exact"
      },
      {
        "amount": "2082",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "4an2sqamWWhny9mjLsMtGXCDXakeNtg6vSLq4QvhdmQu",
        "scheme": "exact"
      }
    ],
    "description": "Text to speech (TTS) API: text read aloud by 11 voice models (Kokoro, ElevenLabs, Gemini, xAI, MiniMax and more; list at GET /v1/audio/models), no API key needed. Call it when an agent needs spoken audio made from text. OpenAI speech request format, mp3 by default. Served by SingIt.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "input": "Hello from SingIt.",
              "model": "venice-kokoro-tts",
              "response_format": "mp3",
              "voice": "af_heart"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "input": {
                      "description": "The text to read aloud.",
                      "maxLength": 4096,
                      "minLength": 1,
                      "type": "string"
                    },
                    "model": {
                      "description": "A speech model id from GET /v1/audio/models.",
                      "examples": [
                        "venice-kokoro-tts"
                      ],
                      "type": "string"
                    },
                    "response_format": {
                      "default": "mp3",
                      "description": "The audio format.",
                      "enum": [
                        "mp3",
                        "opus",
                        "aac",
                        "flac",
                        "wav",
                        "pcm"
                      ],
                      "type": "string"
                    },
                    "speed": {
                      "description": "Speaking speed.",
                      "maximum": 4,
                      "minimum": 0.25,
                      "type": "number"
                    },
                    "voice": {
                      "description": "A voice of the model; they are listed at GET /v1/audio/models.",
                      "examples": [
                        "af_heart"
                      ],
                      "maxLength": 60,
                      "type": "string"
                    }
                  },
                  "required": [
                    "model",
                    "input"
                  ]
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "builder-code": {
        "info": {
          "a": "bc_is3fuv36"
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "additionalProperties": false,
          "properties": {
            "a": {
              "description": "App builder code",
              "pattern": "^[a-z0-9_]{1,32}$",
              "type": "string"
            },
            "s": {
              "description": "Service builder codes",
              "items": {
                "pattern": "^[a-z0-9_]{1,32}$",
                "type": "string"
              },
              "maxItems": 11,
              "type": "array"
            },
            "w": {
              "description": "Wallet builder code",
              "pattern": "^[a-z0-9_]{1,32}$",
              "type": "string"
            }
          },
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1792921332/bazaar-icons/a240c598b3f928d1.png",
    "lastUpdated": "2026-10-27T16:48:46.581Z",
    "quality": {
      "l30DaysTotalCalls": 4,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-26T05:55:50.065Z"
    },
    "resource": "https://ask.singitai.app/v1/audio/speech",
    "serviceName": "SingIt Text to Speech",
    "tags": [
      "text-to-speech",
      "tts",
      "speech",
      "audio",
      "openai-compatible"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Text to speech (TTS) API: text read aloud by 11 voice models (Kokoro, ElevenLabs, Gemini, xAI, MiniMax and more; list at GET /v1/audio/models), no API key needed. Call it when an agent needs spoken audio made from text. OpenAI speech request format, mp3 by default. Served by SingIt."
}

What the leaf hashes

{"body":"75d5aa3eaf43cfa10a900377a926ee30c26b0b3c2ccc029e18d8748ae422c87d","id":527689,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793124848427082,"prev":45794,"subject":"x402_bazaar:https://ask.singitai.app/v1/audio/speech","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x039719180d60b51da6b9e19c986104876c471776794d0325e2bb2f4b1a731320
2. 0x0876b02b7d4b096dcfcbca77f47b815afb8f3af6e8f1c5e7ad7703d39b961724
3. 0xdda80b0cefe01a276d47fb05b37156c726c86c3f5b54382a7aee47a661e6fbe4
4. 0x153b7d72a96bd43d87c02172b2700da5f020830df4099c219bb0da8c4cd3bac6
5. 0xf449f0dbe8f8e2f94ba48f636f75e9fa04abce0d30b20f15ef7da63479c0a53a
6. 0xec4133a32ee8b3d4969b3098ad55d394ef513fb663ee53608112c11958943779
7. 0xc05c8bf1fe1be71e4464ed480b11798ce1b7f7157fd2ec87e26e2cbbc99b8b1d
8. 0x664f55a9a969d403aa1f31c1224b3fab1e498529409c3a137bcdb33e0a6efa89
9. 0x29616e246d17d80bec73757375e4a1f2cd0395f79cd494ceeeb1565036b3fc91
10. 0x4f51aa4fbe1c66521c58ff8a79b969308a92af83c3dfa439dc3d45be02e035e3
11. 0xb428d1c0ffbb1f2e74ff7e62f152f655db4bd1935bbdcbefa7286b1094075929
12. 0x05916cc6b98491a0d541e4ecca3d0132fa255184243406b5a8a52bb1b6b63bd0
13. 0x5b34b9f89512a83faa4bfecec322037670cc1af58e6e94a86fe88934434d7ddf
14. 0x29e12cb67839430fa64ab8bd05d52bab606f2978d9e6d2fb094fece9438fd4de
15. 0x2cf27e8a181d60d0dd27c186c2eddfcbb4e8fa71cf66feeb55a4d730e15ee8c4
16. 0x518b93854db03dc9fc938883abf30da6eaae5ae0d4336903968fd32a7df8c71b
17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4