Does USDon / JPF 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":128578782,"chain":"bnb","checked_at":"2026-10-19T15:32:39Z","dev":false,"expires_at":"2026-10-20T15:32:39Z","issuer":"Ondo","pool":{"base":{"address":"0x1f8955E640Cbd9abc3C3Bb408c9E2E1f5F20DfE6","balance":"89277318269710951803","decimals":18,"symbol":"USDon"},"chain":"bnb","dex":"pancake-v3","pool":"0x27Eb93a087C5AAbf9E2f3427bfdCC31Cf9f44319","quote":{"address":"0x70c629478707c8A4eAe7FDc0EE54A9F61bEE4901","balance":"207969323008086269047","decimals":18,"symbol":"JPF"}},"quote_share_of_supply":3.0683101726784623e-6,"reads":[{"block":128578782,"method":"eth_blockNumber","params":[],"result_hash":"426a771032aa2dd7528ae91c12f3ea889b6ca12657a78119caebfc21a813ee39","slot":null},{"block":null,"method":"eth_call","params":["0x27Eb93a087C5AAbf9E2f3427bfdCC31Cf9f44319","token0()"],"raw_result":"0x1f8955e640cbd9abc3c3bb408c9e2e1f5f20dfe6","result_hash":"941b3bf3e4c76cb1167c82f156710dc873088830f8d005c67e1addd3d9d832fd","slot":null},{"block":null,"method":"eth_call","params":["0x27Eb93a087C5AAbf9E2f3427bfdCC31Cf9f44319","token1()"],"raw_result":"0x70c629478707c8a4eae7fdc0ee54a9f61bee4901","result_hash":"3b2c8aa6ac7f4aeb3f10f406093b5b9378cfd8c6a5b3f996e1cdd7394e2f6a85","slot":null},{"block":null,"method":"eth_call","params":["0x27Eb93a087C5AAbf9E2f3427bfdCC31Cf9f44319","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x27Eb93a087C5AAbf9E2f3427bfdCC31Cf9f44319","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x27Eb93a087C5AAbf9E2f3427bfdCC31Cf9f44319","factory()"],"raw_result":"0x0bfbcf9fa4f9c56b0f40a671ad40e0805a091865","result_hash":"2e3d0bedb6ff98db8ecf6c7b57f2028219517abe46f0f5212ff489a2c45cafbd","slot":null},{"block":null,"method":"eth_call","params":["0x27Eb93a087C5AAbf9E2f3427bfdCC31Cf9f44319","fee()"],"raw_result":"2500","result_hash":"c470156de4cb3620b0749c19d984d0666924d83d0ec37998dd6b637a87a2ec3b","slot":null},{"block":null,"method":"eth_call","params":["0x0BFbCF9fa4f9C56B0F40a671Ad40E0805A091865","getPool","0x1f8955E640Cbd9abc3C3Bb408c9E2E1f5F20DfE6","0x70c629478707c8A4eAe7FDc0EE54A9F61bEE4901","0x9c4"],"raw_result":"0x27eb93a087c5aabf9e2f3427bfdcc31cf9f44319","result_hash":"fe4ce0ff221352f3551e64529334091c02cb969707a03ff447ad8658cd27ad45","slot":null},{"block":null,"method":"eth_call","params":["0x1f8955E640Cbd9abc3C3Bb408c9E2E1f5F20DfE6","symbol()"],"raw_result":"Some(\"USDon\")","result_hash":"c1f2a7a70dafac2015c6623af748d80fa986e11cf3bc6e2c4a82dbaa3ee65186","slot":null},{"block":null,"method":"eth_call","params":["0x1f8955E640Cbd9abc3C3Bb408c9E2E1f5F20DfE6","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x1f8955E640Cbd9abc3C3Bb408c9E2E1f5F20DfE6","balanceOf","0x27Eb93a087C5AAbf9E2f3427bfdCC31Cf9f44319"],"raw_result":"Some(\"89277318269710951803\")","result_hash":"bf0bf64402b69dfad1360c7ceda3d422839a8811c2c69926ffdd4223973f700d","slot":null},{"block":null,"method":"eth_call","params":["0x70c629478707c8A4eAe7FDc0EE54A9F61bEE4901","symbol()"],"raw_result":"Some(\"JPF\")","result_hash":"8d248370e596f231428822df40bc446c95db691f13ab32d43949b87c5e60288a","slot":null},{"block":null,"method":"eth_call","params":["0x70c629478707c8A4eAe7FDc0EE54A9F61bEE4901","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x70c629478707c8A4eAe7FDc0EE54A9F61bEE4901","balanceOf","0x27Eb93a087C5AAbf9E2f3427bfdCC31Cf9f44319"],"raw_result":"Some(\"207969323008086269047\")","result_hash":"4fca7d6441744764a28e7da9e9c797001ee484928277d08d84f51d759d4cd27c","slot":null},{"block":null,"method":"eth_call","params":["0x70c629478707c8A4eAe7FDc0EE54A9F61bEE4901","symbol()"],"raw_result":"Some(\"JPF\")","result_hash":"8d248370e596f231428822df40bc446c95db691f13ab32d43949b87c5e60288a","slot":null},{"block":null,"method":"eth_call","params":["0x70c629478707c8A4eAe7FDc0EE54A9F61bEE4901","name()"],"raw_result":"Some(\"Julius personal farm\")","result_hash":"08820e6e2c3ef656296efff8784b08c17ac97ed4636beb4b65a6f88a7ea27eb0","slot":null},{"block":null,"method":"eth_call","params":["0x70c629478707c8A4eAe7FDc0EE54A9F61bEE4901","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x70c629478707c8A4eAe7FDc0EE54A9F61bEE4901","totalSupply()"],"raw_result":"Some(\"1000000000000000000000000\")","result_hash":"29e309e3b943b514eee171b0c8f1348f1e8e33614ee2211fddb192da1a765d10","slot":null},{"block":null,"method":"eth_call","params":["0x1f8955E640Cbd9abc3C3Bb408c9E2E1f5F20DfE6","symbol()"],"raw_result":"Some(\"USDon\")","result_hash":"c1f2a7a70dafac2015c6623af748d80fa986e11cf3bc6e2c4a82dbaa3ee65186","slot":null},{"block":null,"method":"eth_call","params":["0x1f8955E640Cbd9abc3C3Bb408c9E2E1f5F20DfE6","name()"],"raw_result":"Some(\"Ondo U.S. Dollar Token\")","result_hash":"3c56680ac062cb7877e9841c61b13ca3619b5451f8bc537da51b116e866a9af3","slot":null},{"block":null,"method":"eth_call","params":["0x1f8955E640Cbd9abc3C3Bb408c9E2E1f5F20DfE6","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x1f8955E640Cbd9abc3C3Bb408c9E2E1f5F20DfE6","totalSupply()"],"raw_result":"Some(\"29096575393411703729561757\")","result_hash":"240136bc53dffcc605484d0cce8874fbc3aa06d7e82dcd96617e61610bb56c6b","slot":null},{"block":null,"method":"eth_getCode","params":["0x1f8955E640Cbd9abc3C3Bb408c9E2E1f5F20DfE6","latest"],"result_hash":"5c44abfbe06f31ba695b6acd0b44005d42432099f25c1d43e94acda2bef4bb7d","slot":null},{"block":null,"method":"eth_getCode","params":["0x1f8955E640Cbd9abc3C3Bb408c9E2E1f5F20DfE6","latest"],"result_hash":"5c44abfbe06f31ba695b6acd0b44005d42432099f25c1d43e94acda2bef4bb7d","slot":null}],"registry_entry":{"chain":"bnb","contract":"0x1f8955E640Cbd9abc3C3Bb408c9E2E1f5F20DfE6","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T20:40:22Z","name":"Ondo U.S. Dollar Token","official_deployments":[{"address":"0xAcE8E719899F6E91831B18AE746C9A965c2119F1","network":"Ethereum"},{"address":"0x1f8955E640Cbd9abc3C3Bb408c9E2E1f5F20DfE6","network":"BNB Chain"},{"address":"ZPFtoCe7WWqG4N3ZFRccS8T9SMBeHsd1Vmgv2i7ondo","network":"Solana"}],"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":"USD"},"registry_hash":"92e84a5097c412088157ecc6f5394b143eea965b7cf43a01187023b0d9844862","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x27Eb93a087C5AAbf9E2f3427bfdCC31Cf9f44319","ticker":"USD","verdict":{"Verified":{"issuer":"Ondo","ticker":"USD"}},"version":1}

Signature

HR/A8Qm9LTv9k2RN1ydLOuf5uiIUnzgxJdXXBmKB4l1aLO8m4+s53smwoKJdeQV1NYcvhAlMbxCWH5SPZf0AAA==

API call

GET /api/attest/0121fc5a1b18676bec78d9d353957672e40dc56e99377a12dcd9e48b83a64d95

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.