Does DELL / USDG 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":91678065,"chain":"robinhood","checked_at":"2026-10-18T09:52:25Z","dev":false,"expires_at":"2026-10-19T09:52:25Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"31396376073","decimals":6,"symbol":"USDG"},"chain":"robinhood","dex":"uniswap-v3","pool":"0xc30c89cB7815A1488b7998D15eEC73961707Fc5a","quote":{"address":"0x941AE714EC6D8130c7B75d67160Ca08f1e7d11Dd","balance":"672313479312345663998","decimals":18,"symbol":"DELL"}},"quote_share_of_supply":0.457491206484461,"reads":[{"block":91678065,"method":"eth_blockNumber","params":[],"result_hash":"0d5f4ab06444e6a3f6f024c20c4b965cd61f881d5f732c56b15f9e538322ac9c","slot":null},{"block":null,"method":"eth_call","params":["0xc30c89cB7815A1488b7998D15eEC73961707Fc5a","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xc30c89cB7815A1488b7998D15eEC73961707Fc5a","token1()"],"raw_result":"0x941ae714ec6d8130c7b75d67160ca08f1e7d11dd","result_hash":"038f3ee1724f48e9ae22cd4286a2c67e4f003bd7080b53318178764c9a3cf54c","slot":null},{"block":null,"method":"eth_call","params":["0xc30c89cB7815A1488b7998D15eEC73961707Fc5a","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xc30c89cB7815A1488b7998D15eEC73961707Fc5a","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xc30c89cB7815A1488b7998D15eEC73961707Fc5a","factory()"],"raw_result":"0x1f7d7550b1b028f7571e69a784071f0205fd2efa","result_hash":"bf7614e6e838b22e4363dfcb3022451641875235ca13e64f8d2d8c3334ff85f3","slot":null},{"block":null,"method":"eth_call","params":["0xc30c89cB7815A1488b7998D15eEC73961707Fc5a","fee()"],"raw_result":"10000","result_hash":"328d48ab2376d2f42d3af5ba69086143c8f5fe883ed195a8280b2154a5711a33","slot":null},{"block":null,"method":"eth_call","params":["0x1f7d7550B1b028f7571E69A784071F0205FD2EfA","getPool","0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","0x941AE714EC6D8130c7B75d67160Ca08f1e7d11Dd","0x2710"],"raw_result":"0xc30c89cb7815a1488b7998d15eec73961707fc5a","result_hash":"a97dbef25c17544d0a66a65c2804cbe9cc585c7442f96e16e712b51bef41d4aa","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","symbol()"],"raw_result":"Some(\"USDG\")","result_hash":"5cbfd9547b12ffd28d96e5f55c97290c4f230a8d7ad7bbe91dc15f2e61c1a3c5","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balanceOf","0xc30c89cB7815A1488b7998D15eEC73961707Fc5a"],"raw_result":"Some(\"31396376073\")","result_hash":"d72a0e0757f8a1dd51ad3f554ae6db6cc4f818b18bcad7d3bc51db144d79e384","slot":null},{"block":null,"method":"eth_call","params":["0x941AE714EC6D8130c7B75d67160Ca08f1e7d11Dd","symbol()"],"raw_result":"Some(\"DELL\")","result_hash":"f97f840945bc2faf32a6e2f217670e2b044c3bfeeeacc11aa45ffe8aa6e37002","slot":null},{"block":null,"method":"eth_call","params":["0x941AE714EC6D8130c7B75d67160Ca08f1e7d11Dd","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x941AE714EC6D8130c7B75d67160Ca08f1e7d11Dd","balanceOf","0xc30c89cB7815A1488b7998D15eEC73961707Fc5a"],"raw_result":"Some(\"672313479312345663998\")","result_hash":"2e9d67c51b6f8339e563cc38e9b97421f4343036d098956d5924a9d07e279e1d","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","symbol()"],"raw_result":"Some(\"USDG\")","result_hash":"5cbfd9547b12ffd28d96e5f55c97290c4f230a8d7ad7bbe91dc15f2e61c1a3c5","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","name()"],"raw_result":"Some(\"Global Dollar\")","result_hash":"e34c795a5a7df6a2269bde7247321204357731d7742ef5974b04eb6899db8b11","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","totalSupply()"],"raw_result":"Some(\"696510571472896\")","result_hash":"3bf47cc44e79235c2a4786a9e16c733cbbc4aa81b60a1a84187551f9e56b0257","slot":null},{"block":null,"method":"eth_call","params":["0x941AE714EC6D8130c7B75d67160Ca08f1e7d11Dd","symbol()"],"raw_result":"Some(\"DELL\")","result_hash":"f97f840945bc2faf32a6e2f217670e2b044c3bfeeeacc11aa45ffe8aa6e37002","slot":null},{"block":null,"method":"eth_call","params":["0x941AE714EC6D8130c7B75d67160Ca08f1e7d11Dd","name()"],"raw_result":"Some(\"Dell • Robinhood Token\")","result_hash":"1651a67df2fad4c6e585dac27407fa9f40c213985d3e9089b4e020124839dfb2","slot":null},{"block":null,"method":"eth_call","params":["0x941AE714EC6D8130c7B75d67160Ca08f1e7d11Dd","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x941AE714EC6D8130c7B75d67160Ca08f1e7d11Dd","totalSupply()"],"raw_result":"Some(\"1469565905930000000000\")","result_hash":"4a3e4870d9129fb00dc6fff9f36f3604db16d6c618e03a0627ef166a144f77b3","slot":null},{"block":null,"method":"eth_call","params":["0x941AE714EC6D8130c7B75d67160Ca08f1e7d11Dd","uiMultiplier()"],"raw_result":"1000063708620124549","result_hash":"d8f69d79630c42f68e51affa767066368dfdf79526cda808847cc97dbca1cb63","slot":null},{"block":null,"method":"eth_getCode","params":["0x941AE714EC6D8130c7B75d67160Ca08f1e7d11Dd","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x941AE714EC6D8130c7B75d67160Ca08f1e7d11Dd","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"robinhood","contract":"0x941AE714EC6D8130c7B75d67160Ca08f1e7d11Dd","decimals":18,"issuer":"Robinhood","last_checked":"2026-10-18T09:47:33Z","name":"Dell","official_deployments":[{"address":"0x941AE714EC6D8130c7B75d67160Ca08f1e7d11Dd","network":"Robinhood Chain"}],"source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"DELL"},"registry_hash":"3143486c8ed17e52c07540b096bdf4ef50abfca368b23311d9290e9923561570","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xc30c89cB7815A1488b7998D15eEC73961707Fc5a","ticker":"DELL","verdict":{"Verified":{"issuer":"Robinhood","ticker":"DELL"}},"version":1}

Signature

NP4wq254l8xzb3SPu86j5651IoDkm7jsaXSM1KMuMikC2IBHnaZxfdstTzsXZYIy0h+Jz4NpUlrJgqXEtXSXAA==

API call

GET /api/attest/4a3d4a18425e19bb1c619ad8dec702c8b6dd85fc2b989f144403283f423f08b7

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.