ASML/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":79461290,"chain":"RobinhoodChain","checked_at":"2026-10-03T23:05:08Z","dev":false,"expires_at":"2026-10-04T23:05:08Z","issuer":"Robinhood","pool":{"base":{"address":"0x47F93d52cBeC7C6D2CfC080e154002370a60dAEA","balance":"3497216894329418258","decimals":18,"symbol":"ASML"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0xe75b5128EE450DD7C30F9a24D581418047ba017F","quote":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"11105180930","decimals":6,"symbol":"USDG"}},"quote_share_of_supply":0.050621246328823456,"reads":[{"block":null,"method":"eth_getCode","params":["0xe75b5128EE450DD7C30F9a24D581418047ba017F","latest"],"result_hash":"570760f91ed9873866124edc9627e4b244f69b382f912d790eb138dcbca99f71","slot":null},{"block":79461290,"method":"eth_blockNumber","params":[],"result_hash":"36ff0a52681d5e239ea9e3db0ea498aa69afb894fa1da98ef22f907ac856ee4c","slot":null},{"block":null,"method":"eth_call","params":["0xe75b5128EE450DD7C30F9a24D581418047ba017F","token0()"],"raw_result":"0x47f93d52cbec7c6d2cfc080e154002370a60daea","result_hash":"2692a02efa07e495ab3f4ce7b5371d710b0049591e7d8f1882fc98d8da8c5183","slot":null},{"block":null,"method":"eth_call","params":["0xe75b5128EE450DD7C30F9a24D581418047ba017F","token1()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xe75b5128EE450DD7C30F9a24D581418047ba017F","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xe75b5128EE450DD7C30F9a24D581418047ba017F","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xe75b5128EE450DD7C30F9a24D581418047ba017F","factory()"],"raw_result":"Some(0xe0c4ceb92d08ca985bb70fe0a22feb121a9854a8)","result_hash":"317250863b6884b96004007b3587ad2dfee13451d926500b1fc9bac72405dd84","slot":null},{"block":null,"method":"eth_call","params":["0x47F93d52cBeC7C6D2CfC080e154002370a60dAEA","symbol()"],"raw_result":"Some(\"ASML\")","result_hash":"921a8037ea96a7ac503b4111856d3f637cf81cbd7f849320d5d0ec167e8e0807","slot":null},{"block":null,"method":"eth_call","params":["0x47F93d52cBeC7C6D2CfC080e154002370a60dAEA","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x47F93d52cBeC7C6D2CfC080e154002370a60dAEA","balanceOf","0xe75b5128EE450DD7C30F9a24D581418047ba017F"],"raw_result":"Some(\"3497216894329418258\")","result_hash":"8973bbe6f99f0b32d52f451cb9e1d4c81c5ae6b40685586ce715da25d251827f","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","0xe75b5128EE450DD7C30F9a24D581418047ba017F"],"raw_result":"Some(\"11105180930\")","result_hash":"4a6cfb2239d8a3e2bb5b336ec772e91d573015498b94f59851dd3d874b392129","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(\"699810244136124\")","result_hash":"25fcceb92917e1e70ae1c2f8656792dd84315ea53a7c8853269b778e4f8dd50b","slot":null},{"block":null,"method":"eth_call","params":["0x47F93d52cBeC7C6D2CfC080e154002370a60dAEA","symbol()"],"raw_result":"Some(\"ASML\")","result_hash":"921a8037ea96a7ac503b4111856d3f637cf81cbd7f849320d5d0ec167e8e0807","slot":null},{"block":null,"method":"eth_call","params":["0x47F93d52cBeC7C6D2CfC080e154002370a60dAEA","name()"],"raw_result":"Some(\"ASML Holding NV • Robinhood Token\")","result_hash":"b2159f95e383a27028990ac3c94a124b0f25a970c3438cdadfa46ce7019f076c","slot":null},{"block":null,"method":"eth_call","params":["0x47F93d52cBeC7C6D2CfC080e154002370a60dAEA","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x47F93d52cBeC7C6D2CfC080e154002370a60dAEA","totalSupply()"],"raw_result":"Some(\"69085950030000000000\")","result_hash":"90d796d6040d3b59400f8ebff7996b2776a7ef5ebb1a873fb269c7452a30b84f","slot":null},{"block":null,"method":"eth_call","params":["0x47F93d52cBeC7C6D2CfC080e154002370a60dAEA","uiMultiplier()"],"raw_result":"1000101323251417769","result_hash":"23149dbee863d5b5a19ca7bb986da982f323eba41810a98ab204de9eb6105729","slot":null},{"block":null,"method":"eth_getCode","params":["0x47F93d52cBeC7C6D2CfC080e154002370a60dAEA","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x47F93d52cBeC7C6D2CfC080e154002370a60dAEA","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0x47F93d52cBeC7C6D2CfC080e154002370a60dAEA","decimals":18,"issuer":"Robinhood","last_checked":"2026-10-03T22:14:21Z","name":"ASML Holding NV","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"ASML"},"registry_hash":"006986c2cdeb6f5281a7abf7a127ac65f5337499c7a4f8290df6f511d987f46e","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xe75b5128EE450DD7C30F9a24D581418047ba017F","ticker":"ASML","verdict":{"Verified":{"issuer":"Robinhood","ticker":"ASML"}},"version":1}

Signature

Wt17lHRBwPiZfEtp6HyG0duwZo6X7g5edVw3tm0RkO12OYjerUmu7OkwyzqAMWkL+mzpmx3yLxCMoWcLl4rBBw==

API call

GET /api/attest/1d28f54e19989700814db608f33fd883136f8bad5897a2f7089e203ad711dec2

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.