Does AAPLon / USDC match its issuer's published contract?

QED signs a canonical JSON payload. Fetch the public key from /.well-known/qed.json, then check the signature against this payload.

Canonical JSON

{"block":26225647,"chain":"ethereum","checked_at":"2026-10-19T09:12:30Z","dev":false,"expires_at":"2026-10-20T09:12:30Z","issuer":"Ondo","pool":{"base":{"address":"0x14c3abF95Cb9C93a8b82C1CdCB76D72Cb87b2d4c","balance":"33923621372372078066","decimals":18,"symbol":"AAPLon"},"chain":"ethereum","dex":"uniswap-v3","pool":"0xad82C9EB065a5CFed71DB087e4a52C8a09c69921","quote":{"address":"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","balance":"26747968119","decimals":6,"symbol":"USDC"}},"quote_share_of_supply":0.00205670372620817,"reads":[{"block":26225647,"method":"eth_blockNumber","params":[],"result_hash":"89c92ea25a7d51f6064b921552a1ccef1fd9141d7cdeec7e6809a6923c7a64ee","slot":null},{"block":null,"method":"eth_call","params":["0xad82C9EB065a5CFed71DB087e4a52C8a09c69921","token0()"],"raw_result":"0x14c3abf95cb9c93a8b82c1cdcb76d72cb87b2d4c","result_hash":"cbef9e1e2e3104003d9c7522e822a36ff2209f43af0b42838ccead4fe5ed066f","slot":null},{"block":null,"method":"eth_call","params":["0xad82C9EB065a5CFed71DB087e4a52C8a09c69921","token1()"],"raw_result":"0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48","result_hash":"6239f262cd1d947b947081c9eba6e8771378942478e1d48654f4f132ebb96021","slot":null},{"block":null,"method":"eth_call","params":["0xad82C9EB065a5CFed71DB087e4a52C8a09c69921","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xad82C9EB065a5CFed71DB087e4a52C8a09c69921","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xad82C9EB065a5CFed71DB087e4a52C8a09c69921","factory()"],"raw_result":"0x1f98431c8ad98523631ae4a59f267346ea31f984","result_hash":"24b698329e82b3994906dfbd01281d9a6f12f65aa59de65831657e6e928d4c80","slot":null},{"block":null,"method":"eth_call","params":["0xad82C9EB065a5CFed71DB087e4a52C8a09c69921","fee()"],"raw_result":"10000","result_hash":"328d48ab2376d2f42d3af5ba69086143c8f5fe883ed195a8280b2154a5711a33","slot":null},{"block":null,"method":"eth_call","params":["0x1F98431c8aD98523631AE4a59f267346ea31F984","getPool","0x14c3abF95Cb9C93a8b82C1CdCB76D72Cb87b2d4c","0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","0x2710"],"raw_result":"0xad82c9eb065a5cfed71db087e4a52c8a09c69921","result_hash":"019b19d3fddee1a2c06c521ee070811d3852abe85ce16c67d18b50ff70378e44","slot":null},{"block":null,"method":"eth_call","params":["0x14c3abF95Cb9C93a8b82C1CdCB76D72Cb87b2d4c","symbol()"],"raw_result":"Some(\"AAPLon\")","result_hash":"6cfe5b4e813b281042afd14ebca189eb981c006670cba86b1070efb6a2bf8980","slot":null},{"block":null,"method":"eth_call","params":["0x14c3abF95Cb9C93a8b82C1CdCB76D72Cb87b2d4c","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x14c3abF95Cb9C93a8b82C1CdCB76D72Cb87b2d4c","balanceOf","0xad82C9EB065a5CFed71DB087e4a52C8a09c69921"],"raw_result":"Some(\"33923621372372078066\")","result_hash":"6d568fe0aa13b547055243ea3416e34ff8c6ac59474590180ddce68303436a6d","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","symbol()"],"raw_result":"Some(\"USDC\")","result_hash":"a3c9e246b0832b52e41efce041d8614251f5e288cdd4b192e85bfd3dfcb748ff","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","balanceOf","0xad82C9EB065a5CFed71DB087e4a52C8a09c69921"],"raw_result":"Some(\"26747968119\")","result_hash":"354b36dbbeabd9651325317cf2df3de8559158c572e2cd2a2150a5ba5bb9926c","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","symbol()"],"raw_result":"Some(\"USDC\")","result_hash":"a3c9e246b0832b52e41efce041d8614251f5e288cdd4b192e85bfd3dfcb748ff","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","name()"],"raw_result":"Some(\"USD Coin\")","result_hash":"fe94af15dc887a2c9df1fb0d6d276e6c586ca9d430ffeac0d05e4baee0637fd1","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","totalSupply()"],"raw_result":"Some(\"48160542823533707\")","result_hash":"36ddb40995dc8a65635c5b4b2d3b62d705107a52e0995dce89e7441a21f442fc","slot":null},{"block":null,"method":"eth_call","params":["0x14c3abF95Cb9C93a8b82C1CdCB76D72Cb87b2d4c","symbol()"],"raw_result":"Some(\"AAPLon\")","result_hash":"6cfe5b4e813b281042afd14ebca189eb981c006670cba86b1070efb6a2bf8980","slot":null},{"block":null,"method":"eth_call","params":["0x14c3abF95Cb9C93a8b82C1CdCB76D72Cb87b2d4c","name()"],"raw_result":"Some(\"Apple (Ondo Tokenized)\")","result_hash":"4df95367ca8dd5dbcedce101864ce0e8244551d86114f5d7fd8d5b2fc863e216","slot":null},{"block":null,"method":"eth_call","params":["0x14c3abF95Cb9C93a8b82C1CdCB76D72Cb87b2d4c","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x14c3abF95Cb9C93a8b82C1CdCB76D72Cb87b2d4c","totalSupply()"],"raw_result":"Some(\"16494170229814856340106\")","result_hash":"2b1888ecd073f479bc3e9ad37ba95acc36f4fe89a5cc2b04bacc6135ac860748","slot":null},{"block":null,"method":"eth_getCode","params":["0x14c3abF95Cb9C93a8b82C1CdCB76D72Cb87b2d4c","latest"],"result_hash":"8538a8190a64db88a5e0ec4c95f0129f9eecd6f3a3aacb869262b82d01d123ec","slot":null},{"block":null,"method":"eth_getCode","params":["0x14c3abF95Cb9C93a8b82C1CdCB76D72Cb87b2d4c","latest"],"result_hash":"8538a8190a64db88a5e0ec4c95f0129f9eecd6f3a3aacb869262b82d01d123ec","slot":null}],"registry_entry":{"chain":"ethereum","contract":"0x14c3abF95Cb9C93a8b82C1CdCB76D72Cb87b2d4c","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T20:40:22Z","name":"Apple (Ondo Tokenized)","official_deployments":[{"address":"0x14c3abF95Cb9C93a8b82C1CdCB76D72Cb87b2d4c","network":"Ethereum"},{"address":"0x390a684EF9cADE28A7AD0DFa61AB1Eb3842618c4","network":"BNB Chain"},{"address":"123mYEnRLM2LLYsJW3K6oyYh8uP1fngj732iG638ondo","network":"Solana"},{"address":"0x81db0DF77669b3BE563e7a0591685a2C8C3EE1c5","network":"HyperEVM"}],"source":"https://docs.ondo.finance/addresses.md","source_url":"https://www.dropbox.com/scl/fi/qjfxyg748mx0dwi6up86d/EXTERNAL-Ondo-GM-Tokens-Ondo-GM-Tokens.csv?rlkey=n3no1w78wrah3umsl0nr9s77i&e=2&st=spdit2q1&dl=1","ticker":"AAPL"},"registry_hash":"cae30e4647e421306c11bce2b38fdd359eeecbb2567d393bf8b2a8e3d38c56d5","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xad82C9EB065a5CFed71DB087e4a52C8a09c69921","ticker":"AAPL","verdict":{"Verified":{"issuer":"Ondo","ticker":"AAPL"}},"version":1}

Signature

hd15Qpar4hNXHrIjhUtf0HiuKcCP2HGNuikMsiTTPY3FGnWK0hqHQm3qDD8DKuOudvK+8Zw6OFmTxj1pdb2YAw==

API call

GET /api/attest/0796ca6f421f52d12abfbb53ccb533bc0809c5175f28f6d0b3f81fba17ab260b

1. Fetch the public key and attestation JSON, then verify the signature with the published key.
2. Canonicalize the payload with sorted object keys and no whitespace, then verify its SHA-256 attestation id.
3. Run the API call above and compare the returned payload, serial, signer, and signature with this certificate.