MRNA/USDG

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":76793782,"chain":"RobinhoodChain","checked_at":"2026-09-30T20:14:06Z","dev":false,"expires_at":"2026-10-01T20:14:06Z","issuer":"Robinhood","pool":{"base":{"address":"0x43B07D15cE533bEc5476d70C22a78a1B2B662155","balance":"167552764862675600252","decimals":18,"symbol":"MRNA"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0xB40196272A6d2EB5edF6d93bc4DC39856AD95E0E","quote":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"49941637781","decimals":6,"symbol":"USDG"}},"quote_share_of_supply":0.05914573285128948,"reads":[{"block":null,"method":"eth_getCode","params":["0xB40196272A6d2EB5edF6d93bc4DC39856AD95E0E","latest"],"result_hash":"6eb9ebe4b785e51c3af2446b2b6555ae690a85561975c58625cdcf48da5c931e","slot":null},{"block":76793782,"method":"eth_blockNumber","params":[],"result_hash":"76ff179e1b18fb5a641bcda9590ef6f2eaaf58228eb5e9471c50b26cccbbfc01","slot":null},{"block":null,"method":"eth_call","params":["0xB40196272A6d2EB5edF6d93bc4DC39856AD95E0E","token0()"],"raw_result":"0x43b07d15ce533bec5476d70c22a78a1b2b662155","result_hash":"d6b555efe0ea0f2140f1bd2f81cc645203d236e431bbc6fe12e711d86a56688d","slot":null},{"block":null,"method":"eth_call","params":["0xB40196272A6d2EB5edF6d93bc4DC39856AD95E0E","token1()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xB40196272A6d2EB5edF6d93bc4DC39856AD95E0E","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xB40196272A6d2EB5edF6d93bc4DC39856AD95E0E","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xB40196272A6d2EB5edF6d93bc4DC39856AD95E0E","factory()"],"raw_result":"Some(0x1f7d7550b1b028f7571e69a784071f0205fd2efa)","result_hash":"3a5325de1b5dc50662a9e2ec44d8428ded4306d2bd46195f62299474690e30aa","slot":null},{"block":null,"method":"eth_call","params":["0x43B07D15cE533bEc5476d70C22a78a1B2B662155","symbol()"],"raw_result":"Some(\"MRNA\")","result_hash":"66b280a482cbfccf4456ea9595664691b6c8ed29adf6747c3f071583b792f0fc","slot":null},{"block":null,"method":"eth_call","params":["0x43B07D15cE533bEc5476d70C22a78a1B2B662155","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x43B07D15cE533bEc5476d70C22a78a1B2B662155","balanceOf","0xB40196272A6d2EB5edF6d93bc4DC39856AD95E0E"],"raw_result":"Some(\"167552764862675600252\")","result_hash":"5c0a3f0046aad2be76c7ee95f52855c06a28981fece6016b1fe3637857421b25","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","0xB40196272A6d2EB5edF6d93bc4DC39856AD95E0E"],"raw_result":"Some(\"49941637781\")","result_hash":"36f322c1be0e877d848824616d7dffd2b267755ea85bee2978a6982681cec449","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(\"692729797683764\")","result_hash":"0ed88eda63ccf840f721c670f3bfab9f341cc2d02fb4ad0919f398400b72cfd2","slot":null},{"block":null,"method":"eth_call","params":["0x43B07D15cE533bEc5476d70C22a78a1B2B662155","symbol()"],"raw_result":"Some(\"MRNA\")","result_hash":"66b280a482cbfccf4456ea9595664691b6c8ed29adf6747c3f071583b792f0fc","slot":null},{"block":null,"method":"eth_call","params":["0x43B07D15cE533bEc5476d70C22a78a1B2B662155","name()"],"raw_result":"Some(\"Moderna • Robinhood Token\")","result_hash":"ead20aec0fc5d2cba8fa7d3b5de03b3179769f81daaa1afef4febb7a62e662d6","slot":null},{"block":null,"method":"eth_call","params":["0x43B07D15cE533bEc5476d70C22a78a1B2B662155","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x43B07D15cE533bEc5476d70C22a78a1B2B662155","totalSupply()"],"raw_result":"Some(\"2832880020000000000000\")","result_hash":"b23caa0d802bb914374b35cb977747c5536ccb9708e7422517648cdf05877dff","slot":null},{"block":null,"method":"eth_call","params":["0x43B07D15cE533bEc5476d70C22a78a1B2B662155","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0x43B07D15cE533bEc5476d70C22a78a1B2B662155","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x43B07D15cE533bEc5476d70C22a78a1B2B662155","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0x43B07D15cE533bEc5476d70C22a78a1B2B662155","decimals":18,"issuer":"Robinhood","last_checked":"2026-09-30T19:20:14Z","name":"Moderna","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"MRNA"},"registry_hash":"df7642c17e627e7600003c0327d057e934f5c09b8c2142a8b83d77c78caced9e","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xB40196272A6d2EB5edF6d93bc4DC39856AD95E0E","ticker":"MRNA","verdict":{"Verified":{"issuer":"Robinhood","ticker":"MRNA"}},"version":1}

Signature

fBC8P5gqx0XVAGz9xLfHyr0Vvnnk2scUQBd5xe8V8rNYbKXplbHzjNzLQtjgZYHnesQNzetf52GRBR3M9uXSCA==

API call

GET /api/attest/04a4032f3ac6b302d7e4a19324d33026e263819317e23a909a551d4dec42b9c1

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.