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":76081248,"chain":"RobinhoodChain","checked_at":"2026-09-30T00:19:08Z","dev":false,"expires_at":"2026-10-01T00:19:08Z","issuer":"Robinhood","pool":{"base":{"address":"0x43B07D15cE533bEc5476d70C22a78a1B2B662155","balance":"64041550287270653823","decimals":18,"symbol":"MRNA"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0xA34d0667334074DF2d5BfD259e79E6B9cf1fA8Bf","quote":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"71506102208","decimals":6,"symbol":"USDG"}},"quote_share_of_supply":0.024157574963224113,"reads":[{"block":null,"method":"eth_getCode","params":["0xA34d0667334074DF2d5BfD259e79E6B9cf1fA8Bf","latest"],"result_hash":"1ec7023f1797c2052eb002e21c6f5e3be23056519ece96e7f3cb1962382f39bd","slot":null},{"block":76081248,"method":"eth_blockNumber","params":[],"result_hash":"acdee435c21ea1e056976b5f3371504761f9eba3fa3b8422b17d129118031a6e","slot":null},{"block":null,"method":"eth_call","params":["0xA34d0667334074DF2d5BfD259e79E6B9cf1fA8Bf","token0()"],"raw_result":"0x43b07d15ce533bec5476d70c22a78a1b2b662155","result_hash":"d6b555efe0ea0f2140f1bd2f81cc645203d236e431bbc6fe12e711d86a56688d","slot":null},{"block":null,"method":"eth_call","params":["0xA34d0667334074DF2d5BfD259e79E6B9cf1fA8Bf","token1()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xA34d0667334074DF2d5BfD259e79E6B9cf1fA8Bf","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xA34d0667334074DF2d5BfD259e79E6B9cf1fA8Bf","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xA34d0667334074DF2d5BfD259e79E6B9cf1fA8Bf","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","0xA34d0667334074DF2d5BfD259e79E6B9cf1fA8Bf"],"raw_result":"Some(\"64041550287270653823\")","result_hash":"dce7d53d5bb204aad370b8db8067732adb24894d945fedbc599e6299c075d189","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","0xA34d0667334074DF2d5BfD259e79E6B9cf1fA8Bf"],"raw_result":"Some(\"71506102208\")","result_hash":"45d62fb3a301e6d3850a7db4ac9cd5e579887ba03bb677808ea25c1cc4f4490f","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(\"683057258909461\")","result_hash":"3142e10dc87a1fc9e6703ce3e2e4371004f1cef266d780011a30464ee2ebb354","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(\"2650992510000000000000\")","result_hash":"0305ba645449b86981b4673e354d2642028da282673791b95f459d3f53268f24","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":"2026-09-29T23:37:24Z","name":"Moderna","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"MRNA"},"registry_hash":"b3f72fc9046ef9a37e433405d5916bce13581b85d8cce5889f24cf56e53b77b4","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xA34d0667334074DF2d5BfD259e79E6B9cf1fA8Bf","ticker":"MRNA","verdict":{"Verified":{"issuer":"Robinhood","ticker":"MRNA"}},"version":1}

Signature

1H+nla2cdhoI3+3GKregUN8aMddKbFUkCOM0roW60aTtxlwXIkHGBIjlFN3BVqWErrN8C1Szf5zpC8E/3CiVDg==

API call

GET /api/attest/442df7350278d5027e1d6bba36f836ab78e0d29869e4bbf562b8d2745de47ff5

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.