JNJ/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":76128080,"chain":"RobinhoodChain","checked_at":"2026-09-30T01:37:34Z","dev":false,"expires_at":"2026-10-01T01:37:34Z","issuer":"Robinhood","pool":{"base":{"address":"0x03DfbBE0AC4E7bCDaFd08eD41A400326B77D8c80","balance":"115093062128005305936","decimals":18,"symbol":"JNJ"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0x7F0aCE18D1dCEd47063CF26e649bc8AB14D09e67","quote":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"18016421120","decimals":6,"symbol":"USDG"}},"quote_share_of_supply":0.12534640186013424,"reads":[{"block":null,"method":"eth_getCode","params":["0x7F0aCE18D1dCEd47063CF26e649bc8AB14D09e67","latest"],"result_hash":"4e0dd078dcff7eafccf47b6b7d91dca946de1d3f68c1bdc4b783f3d4f94b86c9","slot":null},{"block":76128080,"method":"eth_blockNumber","params":[],"result_hash":"2c92a22bdc750ad6aa19645b2052bd09f3bedb53f72437c8ecba3e1fd47bc2bb","slot":null},{"block":null,"method":"eth_call","params":["0x7F0aCE18D1dCEd47063CF26e649bc8AB14D09e67","token0()"],"raw_result":"0x03dfbbe0ac4e7bcdafd08ed41a400326b77d8c80","result_hash":"e7a2895c61f273d1179adbe58335610eae832c633c0506649f11454c209b23c2","slot":null},{"block":null,"method":"eth_call","params":["0x7F0aCE18D1dCEd47063CF26e649bc8AB14D09e67","token1()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0x7F0aCE18D1dCEd47063CF26e649bc8AB14D09e67","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x7F0aCE18D1dCEd47063CF26e649bc8AB14D09e67","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x7F0aCE18D1dCEd47063CF26e649bc8AB14D09e67","factory()"],"raw_result":"Some(0x1f7d7550b1b028f7571e69a784071f0205fd2efa)","result_hash":"3a5325de1b5dc50662a9e2ec44d8428ded4306d2bd46195f62299474690e30aa","slot":null},{"block":null,"method":"eth_call","params":["0x03DfbBE0AC4E7bCDaFd08eD41A400326B77D8c80","symbol()"],"raw_result":"Some(\"JNJ\")","result_hash":"f3de0e5b7b16a6bf3c8711a60c78fb48e6659bec792e9e098853f81cf30029e5","slot":null},{"block":null,"method":"eth_call","params":["0x03DfbBE0AC4E7bCDaFd08eD41A400326B77D8c80","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x03DfbBE0AC4E7bCDaFd08eD41A400326B77D8c80","balanceOf","0x7F0aCE18D1dCEd47063CF26e649bc8AB14D09e67"],"raw_result":"Some(\"115093062128005305936\")","result_hash":"cf44437fc8344d6da65511ca14c6fea893379f9d788c37f63d5fcc8e519a48b4","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","0x7F0aCE18D1dCEd47063CF26e649bc8AB14D09e67"],"raw_result":"Some(\"18016421120\")","result_hash":"01aa18108c66017236c05f261f1de495614e3fda636f1d07f04860ea39fd9737","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(\"684206116727748\")","result_hash":"c28c2840d974e7edbc2a78b90480774f945654809c745dedb1dcb4e21aaea62f","slot":null},{"block":null,"method":"eth_call","params":["0x03DfbBE0AC4E7bCDaFd08eD41A400326B77D8c80","symbol()"],"raw_result":"Some(\"JNJ\")","result_hash":"f3de0e5b7b16a6bf3c8711a60c78fb48e6659bec792e9e098853f81cf30029e5","slot":null},{"block":null,"method":"eth_call","params":["0x03DfbBE0AC4E7bCDaFd08eD41A400326B77D8c80","name()"],"raw_result":"Some(\"Johnson & Johnson • Robinhood Token\")","result_hash":"97903a0109760e1e5d45e4b5255bdad6b371c5444b78a25cb608cdee21db7171","slot":null},{"block":null,"method":"eth_call","params":["0x03DfbBE0AC4E7bCDaFd08eD41A400326B77D8c80","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x03DfbBE0AC4E7bCDaFd08eD41A400326B77D8c80","totalSupply()"],"raw_result":"Some(\"918199967610000000000\")","result_hash":"26650eef4b7351bb12bee3a9b7466f8dec47610e3fc2b58b39109791d7547826","slot":null},{"block":null,"method":"eth_call","params":["0x03DfbBE0AC4E7bCDaFd08eD41A400326B77D8c80","uiMultiplier()"],"raw_result":"1000021490286701962","result_hash":"971345e42cf77d3afc012672ea3eaf15919e8e35d3a83ae8db6207835d6f233d","slot":null},{"block":null,"method":"eth_getCode","params":["0x03DfbBE0AC4E7bCDaFd08eD41A400326B77D8c80","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x03DfbBE0AC4E7bCDaFd08eD41A400326B77D8c80","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0x03DfbBE0AC4E7bCDaFd08eD41A400326B77D8c80","decimals":18,"issuer":"Robinhood","last_checked":"2026-09-30T00:37:24Z","name":"Johnson & Johnson","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"JNJ"},"registry_hash":"5524ad353114ce82e4459bdb0533016e63f15d54f628b91498b20cf2b964d0de","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x7F0aCE18D1dCEd47063CF26e649bc8AB14D09e67","ticker":"JNJ","verdict":{"Verified":{"issuer":"Robinhood","ticker":"JNJ"}},"version":1}

Signature

fXsRXVVwGINK8cQFt7xAajasRqxbiuOUVbKfd9JriEIlFbVnDrTMbjcZSdUYrm+RXBNZJqvuSdrOAsGXENwzAQ==

API call

GET /api/attest/62c82bea82597e7d1ae0fe52da03f5b8e34b8f81e26fb68efaa1c45d39645117

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.