Does GLDon / 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":128479042,"chain":"bnb","checked_at":"2026-10-19T03:04:14Z","dev":false,"expires_at":"2026-10-20T03:04:14Z","issuer":"Ondo","pool":{"base":{"address":"0x55d398326f99059fF775485246999027B3197955","balance":"1111443369133621148189","decimals":18,"symbol":"USDT"},"chain":"bnb","dex":"uniswap-v3","pool":"0xf95AcBfeCc913F59Aa35A6827d15037468332e78","quote":{"address":"0xfA9a1E901085e269f6D428F79Cd5252d8b919344","balance":"11513100544666658696","decimals":18,"symbol":"GLDon"}},"quote_share_of_supply":0.005588085774953429,"reads":[{"block":128479042,"method":"eth_blockNumber","params":[],"result_hash":"f104f2730851bf6afc691bb221f6da9cb25da822abd404a4fd6ee72fb1eff3da","slot":null},{"block":null,"method":"eth_call","params":["0xf95AcBfeCc913F59Aa35A6827d15037468332e78","token0()"],"raw_result":"0x55d398326f99059ff775485246999027b3197955","result_hash":"66f63b72a2cc2125a9e796877d8894f3c7efb1d98419d7f1f9800b08f25cdc61","slot":null},{"block":null,"method":"eth_call","params":["0xf95AcBfeCc913F59Aa35A6827d15037468332e78","token1()"],"raw_result":"0xfa9a1e901085e269f6d428f79cd5252d8b919344","result_hash":"45e45f115f0062c974c3ff1c1acd38bef0779e22f864ad4ffa0a03138ede0315","slot":null},{"block":null,"method":"eth_call","params":["0xf95AcBfeCc913F59Aa35A6827d15037468332e78","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xf95AcBfeCc913F59Aa35A6827d15037468332e78","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xf95AcBfeCc913F59Aa35A6827d15037468332e78","factory()"],"raw_result":"0xdb1d10011ad0ff90774d0c6bb92e5c5c8b4461f7","result_hash":"4b482521d7cb760d72486691996fad9e93bcdcc2309e6fc4881175fe267d7fec","slot":null},{"block":null,"method":"eth_call","params":["0xf95AcBfeCc913F59Aa35A6827d15037468332e78","fee()"],"raw_result":"10000","result_hash":"328d48ab2376d2f42d3af5ba69086143c8f5fe883ed195a8280b2154a5711a33","slot":null},{"block":null,"method":"eth_call","params":["0xdB1d10011AD0Ff90774D0C6Bb92e5C5c8b4461F7","getPool","0x55d398326f99059fF775485246999027B3197955","0xfA9a1E901085e269f6D428F79Cd5252d8b919344","0x2710"],"raw_result":"0xf95acbfecc913f59aa35a6827d15037468332e78","result_hash":"ca37f7e1049004a49d6be88de5e587c50ff6d0420b2cee60b87ce0da9242b6bc","slot":null},{"block":null,"method":"eth_call","params":["0x55d398326f99059fF775485246999027B3197955","symbol()"],"raw_result":"Some(\"USDT\")","result_hash":"a851493323e1198c0940c2b2ca5c59e97da9c6f50f63f0c09779709ef2572f84","slot":null},{"block":null,"method":"eth_call","params":["0x55d398326f99059fF775485246999027B3197955","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x55d398326f99059fF775485246999027B3197955","balanceOf","0xf95AcBfeCc913F59Aa35A6827d15037468332e78"],"raw_result":"Some(\"1111443369133621148189\")","result_hash":"cbfe3882c6d8d21b14d4ad6c4ceb4de1d68305950860d1ea051b3fd3f8754ee0","slot":null},{"block":null,"method":"eth_call","params":["0xfA9a1E901085e269f6D428F79Cd5252d8b919344","symbol()"],"raw_result":"Some(\"GLDon\")","result_hash":"71d0b3ffd6a380010d6f83e679d1725c0a2384d93968cdee4af401d193b021c2","slot":null},{"block":null,"method":"eth_call","params":["0xfA9a1E901085e269f6D428F79Cd5252d8b919344","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xfA9a1E901085e269f6D428F79Cd5252d8b919344","balanceOf","0xf95AcBfeCc913F59Aa35A6827d15037468332e78"],"raw_result":"Some(\"11513100544666658696\")","result_hash":"b0ad8c560062b4b6a5ebe76569ed4f4df2922821e74b2edbcb55f9497676b568","slot":null},{"block":null,"method":"eth_call","params":["0x55d398326f99059fF775485246999027B3197955","symbol()"],"raw_result":"Some(\"USDT\")","result_hash":"a851493323e1198c0940c2b2ca5c59e97da9c6f50f63f0c09779709ef2572f84","slot":null},{"block":null,"method":"eth_call","params":["0x55d398326f99059fF775485246999027B3197955","name()"],"raw_result":"Some(\"Tether USD\")","result_hash":"8f7cfea6e15ea5712d4bf603e3223e8de9dfdee3c5fe9a25ec1181218bd425ad","slot":null},{"block":null,"method":"eth_call","params":["0x55d398326f99059fF775485246999027B3197955","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x55d398326f99059fF775485246999027B3197955","totalSupply()"],"raw_result":"Some(\"9184991859520259774116723649\")","result_hash":"b5a4e3e312d5f88f7b6f5d44368633422f48dda22b217c1ece79f64edd5719c9","slot":null},{"block":null,"method":"eth_call","params":["0xfA9a1E901085e269f6D428F79Cd5252d8b919344","symbol()"],"raw_result":"Some(\"GLDon\")","result_hash":"71d0b3ffd6a380010d6f83e679d1725c0a2384d93968cdee4af401d193b021c2","slot":null},{"block":null,"method":"eth_call","params":["0xfA9a1E901085e269f6D428F79Cd5252d8b919344","name()"],"raw_result":"Some(\"SPDR Gold Shares (Ondo Tokenized)\")","result_hash":"815a4f9058d1f6da2b45febe1d5cfe8a8a4d2ae6e5dc287287d0441c9fe39d57","slot":null},{"block":null,"method":"eth_call","params":["0xfA9a1E901085e269f6D428F79Cd5252d8b919344","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xfA9a1E901085e269f6D428F79Cd5252d8b919344","totalSupply()"],"raw_result":"Some(\"2060294170191510468982\")","result_hash":"2a6e1f68bb8456a7c58b7fa15276b7c278424786ac3d2869f10e163bc1080138","slot":null},{"block":null,"method":"eth_getCode","params":["0xfA9a1E901085e269f6D428F79Cd5252d8b919344","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null},{"block":null,"method":"eth_getCode","params":["0xfA9a1E901085e269f6D428F79Cd5252d8b919344","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null}],"registry_entry":{"chain":"bnb","contract":"0xfA9a1E901085e269f6D428F79Cd5252d8b919344","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T20:40:22Z","name":"SPDR Gold Shares (Ondo Tokenized)","official_deployments":[{"address":"0x423D42E505e64F99b6E277eb7ED324CC5606F139","network":"Ethereum"},{"address":"0xfA9a1E901085e269f6D428F79Cd5252d8b919344","network":"BNB Chain"},{"address":"hWfiw4mcxT8rnNFkk6fsCQSxoxgZ9yVhB6tyeVcondo","network":"Solana"},{"address":"0x95FebDd6f447B5278c9b98743B4254eB02c6EA1d","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":"GLD"},"registry_hash":"0bd20861acb250fc115ebe98f0dbbb7c686b15c772a071c9020aa5154f2d195f","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xf95AcBfeCc913F59Aa35A6827d15037468332e78","ticker":"GLD","verdict":{"Verified":{"issuer":"Ondo","ticker":"GLD"}},"version":1}

Signature

xL4eFZsU+V4qtSCnwDQSoJ3oNunDko1ZaTIt5FvTugiCVzWyTNfnlfUwa/rNjHdzHOep2htN5VtGq+CXzJIXAA==

API call

GET /api/attest/96f7105883af1b9caae4c9996cf061ee8a5de7add155bafbb08795532aab8fec

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.