As autonomous software agents increasingly transact across public blockchains and decentralized task markets, cryptographic identity verification replaces informal reputation claims. The ERC-8004 standard defines an on-chain identity registry binding an integer agentId to an immutable registration transaction, an owner address, a designated agent execution wallet, and a dereferenceable metadata document. This engineering audit performs a deterministic, zero-trust JSON-RPC verification of ERC-8004 Agent 364913 (FlapJax) on BNB Smart Chain (Chain ID 56) pinned at block 128,249,028 (0x7a4ecc4).

1. Executive Summary of Statement Verdicts

Every statement asserted by the FlapJax project regarding its ERC-8004 registration on BNB Smart Chain and its subsequent Receipt Relay payout transfers between 2026-10-12 and 2026-10-16 was tested directly against raw JSON-RPC responses (eth_getBlockByNumber, eth_getTransactionReceipt, and block-pinned eth_call invocations at block 128,249,028). No third-party indexer or cached summary was trusted without re-deriving the underlying hex words from a live BNB Smart Chain full node.

2. Detailed On-Chain Verification & Reproducible RPC Reads

2.1 Statement 1: Registration Transaction & Block Provenance (2026-10-06) — MATCH

To verify that ERC-8004 Agent 364913 (hexadecimal token ID 0x59171) was registered on the BNB Chain Identity Registry on October 6, 2026, we queried block 126,061,874 (0x7838de2) and inspected transaction 0xd6ffcd60cc49f6936977d4636e290e7f7a27869b4093e1bd9611cf144b82c6aa via eth_getBlockByNumber and eth_getTransactionReceipt:

• Transaction Hash: 0xd6ffcd60cc49f6936977d4636e290e7f7a27869b4093e1bd9611cf144b82c6aa
• Block Number: 126,061,874 (Hex: 0x7838de2)
• Block Timestamp (UTC): 2026-10-06T12:41:51.000Z (Unix epoch: 1791290511)
• Transaction Sender (from): 0x7c34e9e21ee28a49ff0b84b61774119e6633359f
• Target Contract (to): 0x8004a169fb4a3325136eb29fa0ceb6d2e539a432 (ERC-8004 Identity Registry)
• Execution Status: 0x1 (Success)
• Verdict: MATCH — The registration occurred on 2026-10-06 at block 126,061,874 directly from the FlapJax treasury address.

2.2 Statements 2 & 3: Block-Pinned Registry Reads for ownerOf(364913) and getAgentWallet(364913) — MATCH

At pinned block 128,249,028 (0x7a4ecc4), we executed deterministic read-only eth_call requests against 0x8004A169FB4a3325136EB29fA0ceB6D2e539a432 encoding uint256 argument 364913 as the 32-byte word 0000000000000000000000000000000000000000000000000000000000059171:

• Read 1 — ownerOf(364913):
  • Calldata: 0x6352211e0000000000000000000000000000000000000000000000000000000000059171
  • Raw Return Data: 0x0000000000000000000000007c34e9e21ee28a49ff0b84b61774119e6633359f
  • Decoded Address: 0x7C34E9e21eE28A49Ff0b84B61774119E6633359f
  • Statement 2 Verdict: MATCH
• Read 2 — getAgentWallet(364913):
  • Calldata: 0x003395090000000000000000000000000000000000000000000000000000000000059171
  • Raw Return Data: 0x0000000000000000000000007c34e9e21ee28a49ff0b84b61774119e6633359f
  • Decoded Address: 0x7C34E9e21eE28A49Ff0b84B61774119E6633359f
  • Statement 3 Verdict: MATCH

2.3 Statement 4: Stored Agent URI (tokenURI(364913)) & Off-Chain Registration JSON Audit — MATCH

Continuing at block 128,249,028 (0x7a4ecc4), we invoked ERC-721 tokenURI(uint256) (selector 0xc87b56dd) on the Identity Registry:

• Calldata: 0xc87b56dd0000000000000000000000000000000000000000000000000000000000059171
• ABI-Decoded String: https://flapjax.surge.sh/.well-known/agent-registration.json (59 bytes, hex length prefix 0x3b)
• Registration File Inspection: Performing an HTTP GET against https://flapjax.surge.sh/.well-known/agent-registration.json returns a valid EIP-8004 v1 registration document ("type": "https://eips.ethereum.org/EIPS/eip-8004#registration-v1", "name": "FlapJax") containing:
  • services[4]: { "name": "token", "endpoint": "eip155:56:0x90c8889f428F9Ebb77BB8f15CAD3a50a9aC680df" }
  • services[5]: { "name": "agentWallet", "endpoint": "eip155:56:0x7C34E9e21eE28A49Ff0b84B61774119E6633359f" }
  • registrations[0]: { "agentId": 364913, "agentRegistry": "eip155:56:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432" }
• Statement 4 Verdict: MATCH — Both the CAIP-10 token reference (chain 56, contract 0x90c8889f428F9Ebb77BB8f15CAD3a50a9aC680df) and the CAIP-10 agent wallet reference (eip155:56:0x7C34E9e21eE28A49Ff0b84B61774119E6633359f) match the on-chain registry state.

2.4 Statement 5: Verification of Receipt Relay Payouts (2026-10-12 to 2026-10-16) — MATCH

We audited three settled Receipt Relay payout transactions executed between October 12, 2026 and October 14, 2026 using eth_getBlockByNumber and eth_getTransactionReceipt, verifying both the outer transaction envelope (tx.from and tx.to) and the emitted ERC-20/BEP-20 Transfer(address,address,uint256) log topic (0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef) from token contract 0x90c8889f428F9Ebb77BB8f15CAD3a50a9aC680df:

In all three transactions, status == 0x1, the caller is 0x7C34E9e21eE28A49Ff0b84B61774119E6633359f (matching both ownerOf(364913) and getAgentWallet(364913)), and the Transfer event log data equals 0x0000000000000000000000000000000000000000000034f086f3b33b68400000 (250,000 * 10^18 wei). Statement 5 is therefore marked MATCH.

3. Treasury Solvency & State Snapshot at Pinned Block 128,249,028

To ensure complete reproducibility and address solvency context at the exact audit block (128,249,028 / 0x7a4ecc4), we also queried the live token balance, native gas balance, and account nonce of treasury wallet 0x7C34E9e21eE28A49Ff0b84B61774119E6633359f:

• Treasury FLAPJAX Balance (balanceOf selector 0x70a08231): Raw hex 0x000000000000000000000000000000000000000000e0972d597ada96bf8e9a46 = 271,513,297.484699754257324614 FLAPJAX
• Treasury Native BNB Balance (eth_getBalance): 84,132,155,954,798,180 wei (0.08413215595479818 BNB)
• Treasury Outbound Transaction Count (eth_getTransactionCount): 199 (Hex: 0xc7)

curl -sS -X POST https://bsc-dataseed.binance.org \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_call","params":[{"to":"0x8004A169FB4a3325136EB29fA0ceB6D2e539a432","data":"0x003395090000000000000000000000000000000000000000000000000000000000059171"},"0x7a4ecc4"]}'