Does ORCLon / USDT 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":26223818,"chain":"ethereum","checked_at":"2026-10-19T03:05:28Z","dev":false,"expires_at":"2026-10-20T03:05:28Z","issuer":"Ondo","pool":{"base":{"address":"0x8a23C6BaadB88512b30475C83Df6A63881e33e1E","balance":"14518665387453423754","decimals":18,"symbol":"ORCLon"},"chain":"ethereum","dex":"uniswap-v3","pool":"0x5f297b8566F1Ac73D885e0A87B053F8b19e4E1f9","quote":{"address":"0xdAC17F958D2ee523a2206206994597C13D831ec7","balance":"73093564","decimals":6,"symbol":"USDT"}},"quote_share_of_supply":0.0021208129725919906,"reads":[{"block":26223818,"method":"eth_blockNumber","params":[],"result_hash":"fd6264e5a47d8766febe068281c575395661c4deecdffc8867bb532812aeb0d9","slot":null},{"block":null,"method":"eth_call","params":["0x5f297b8566F1Ac73D885e0A87B053F8b19e4E1f9","token0()"],"raw_result":"0x8a23c6baadb88512b30475c83df6a63881e33e1e","result_hash":"384aa05ad5e38dfeac71ded1c095bd4809e1152c6ad6b6a030ced732d52e0bf6","slot":null},{"block":null,"method":"eth_call","params":["0x5f297b8566F1Ac73D885e0A87B053F8b19e4E1f9","token1()"],"raw_result":"0xdac17f958d2ee523a2206206994597c13d831ec7","result_hash":"4deb67031fd9d1a1f47c98d5bd6a714bdab41f25c93d4ed6ca6e8767a5ec93e8","slot":null},{"block":null,"method":"eth_call","params":["0x5f297b8566F1Ac73D885e0A87B053F8b19e4E1f9","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x5f297b8566F1Ac73D885e0A87B053F8b19e4E1f9","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x5f297b8566F1Ac73D885e0A87B053F8b19e4E1f9","factory()"],"raw_result":"0x1f98431c8ad98523631ae4a59f267346ea31f984","result_hash":"24b698329e82b3994906dfbd01281d9a6f12f65aa59de65831657e6e928d4c80","slot":null},{"block":null,"method":"eth_call","params":["0x5f297b8566F1Ac73D885e0A87B053F8b19e4E1f9","fee()"],"raw_result":"3000","result_hash":"53232d7da9fd2a1931dcd44af08ec415dd52ab8ecc4037ef5e68eb3753978a2e","slot":null},{"block":null,"method":"eth_call","params":["0x1F98431c8aD98523631AE4a59f267346ea31F984","getPool","0x8a23C6BaadB88512b30475C83Df6A63881e33e1E","0xdAC17F958D2ee523a2206206994597C13D831ec7","0xbb8"],"raw_result":"0x5f297b8566f1ac73d885e0a87b053f8b19e4e1f9","result_hash":"b1157756a1cb04a07e4ff74b392b87dff45796bb41b0db15d8b1827fb01b1340","slot":null},{"block":null,"method":"eth_call","params":["0x8a23C6BaadB88512b30475C83Df6A63881e33e1E","symbol()"],"raw_result":"Some(\"ORCLon\")","result_hash":"87091a45d8574416d89ffec5c26d1f4b7e8a230d18a0074fa51f4290e0173816","slot":null},{"block":null,"method":"eth_call","params":["0x8a23C6BaadB88512b30475C83Df6A63881e33e1E","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x8a23C6BaadB88512b30475C83Df6A63881e33e1E","balanceOf","0x5f297b8566F1Ac73D885e0A87B053F8b19e4E1f9"],"raw_result":"Some(\"14518665387453423754\")","result_hash":"8cad55f711523b1a32c84a0806ed472f195876f2806a18133bba98e13990552e","slot":null},{"block":null,"method":"eth_call","params":["0xdAC17F958D2ee523a2206206994597C13D831ec7","symbol()"],"raw_result":"Some(\"USDT\")","result_hash":"a851493323e1198c0940c2b2ca5c59e97da9c6f50f63f0c09779709ef2572f84","slot":null},{"block":null,"method":"eth_call","params":["0xdAC17F958D2ee523a2206206994597C13D831ec7","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0xdAC17F958D2ee523a2206206994597C13D831ec7","balanceOf","0x5f297b8566F1Ac73D885e0A87B053F8b19e4E1f9"],"raw_result":"Some(\"73093564\")","result_hash":"dbd0ad6e4e28641ce26ff61b43e61c7f8605e96d1434d9399cc8bed8c652f4c9","slot":null},{"block":null,"method":"eth_call","params":["0xdAC17F958D2ee523a2206206994597C13D831ec7","symbol()"],"raw_result":"Some(\"USDT\")","result_hash":"a851493323e1198c0940c2b2ca5c59e97da9c6f50f63f0c09779709ef2572f84","slot":null},{"block":null,"method":"eth_call","params":["0xdAC17F958D2ee523a2206206994597C13D831ec7","name()"],"raw_result":"Some(\"Tether USD\")","result_hash":"8f7cfea6e15ea5712d4bf603e3223e8de9dfdee3c5fe9a25ec1181218bd425ad","slot":null},{"block":null,"method":"eth_call","params":["0xdAC17F958D2ee523a2206206994597C13D831ec7","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0xdAC17F958D2ee523a2206206994597C13D831ec7","totalSupply()"],"raw_result":"Some(\"88302633055702652\")","result_hash":"028899d5036e327561a1b8b5f14461b24862ba6bd517bcebd1cc98ba9879d3ac","slot":null},{"block":null,"method":"eth_call","params":["0x8a23C6BaadB88512b30475C83Df6A63881e33e1E","symbol()"],"raw_result":"Some(\"ORCLon\")","result_hash":"87091a45d8574416d89ffec5c26d1f4b7e8a230d18a0074fa51f4290e0173816","slot":null},{"block":null,"method":"eth_call","params":["0x8a23C6BaadB88512b30475C83Df6A63881e33e1E","name()"],"raw_result":"Some(\"Oracle (Ondo Tokenized)\")","result_hash":"9c8bf70a6bc980ddedb6945eb1cd7f5b05b9922c766e2a30acd835f8f2a0e645","slot":null},{"block":null,"method":"eth_call","params":["0x8a23C6BaadB88512b30475C83Df6A63881e33e1E","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x8a23C6BaadB88512b30475C83Df6A63881e33e1E","totalSupply()"],"raw_result":"Some(\"6845801857628761050188\")","result_hash":"b73ca42573205caaa9fde2d209537b5d80392b097022394db661eed3383f2dce","slot":null},{"block":null,"method":"eth_getCode","params":["0x8a23C6BaadB88512b30475C83Df6A63881e33e1E","latest"],"result_hash":"8538a8190a64db88a5e0ec4c95f0129f9eecd6f3a3aacb869262b82d01d123ec","slot":null},{"block":null,"method":"eth_getCode","params":["0x8a23C6BaadB88512b30475C83Df6A63881e33e1E","latest"],"result_hash":"8538a8190a64db88a5e0ec4c95f0129f9eecd6f3a3aacb869262b82d01d123ec","slot":null}],"registry_entry":{"chain":"ethereum","contract":"0x8a23C6BaadB88512b30475C83Df6A63881e33e1E","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T20:40:22Z","name":"Oracle (Ondo Tokenized)","official_deployments":[{"address":"0x8a23C6BaadB88512b30475C83Df6A63881e33e1E","network":"Ethereum"},{"address":"0x03E4bd1Ea53f1da84513da0319D1f03dD1BBCf93","network":"BNB Chain"},{"address":"GmDADFpfwjfzZq9MfCafMDTS69MgVjtzD7Fd9a4ondo","network":"Solana"},{"address":"0x4775e99a13651B1D077c2fa04Eb9BF007f684af5","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":"ORCL"},"registry_hash":"0bd20861acb250fc115ebe98f0dbbb7c686b15c772a071c9020aa5154f2d195f","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x5f297b8566F1Ac73D885e0A87B053F8b19e4E1f9","ticker":"ORCL","verdict":{"Verified":{"issuer":"Ondo","ticker":"ORCL"}},"version":1}

Signature

j+2TE8xWjP85mALpqWs8XbBXZ8NxLoVeViiORbrsK0DBGigHNhQmZTylKlfBZAnSDAGt4eLWKsdLTlOoHjVyDw==

API call

GET /api/attest/5745b96b8c8c3c9e27c2524e83fb5502386281fe4e8883a3f6ceb3173310d673

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.