USDG/PENG

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":76036440,"chain":"RobinhoodChain","checked_at":"2026-09-29T23:04:32Z","dev":false,"expires_at":"2026-09-30T23:04:32Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"42421949851","decimals":6,"symbol":"USDG"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0x9B977d504D94CF1efBEe30531392545FA55349Ab","quote":{"address":"0x9b23573b156B52565012F5cE02CDF60AFBaa70Be","balance":"467278812613750122020","decimals":18,"symbol":"PENG"}},"quote_share_of_supply":0.26847202763700984,"reads":[{"block":null,"method":"eth_getCode","params":["0x9B977d504D94CF1efBEe30531392545FA55349Ab","latest"],"result_hash":"40d5d08684abee0ebb83e1911c42eee891eb4450c42d11d81cc5da0c13c421a7","slot":null},{"block":76036440,"method":"eth_blockNumber","params":[],"result_hash":"58918b45101ed8b11d30444793140b2439c179904c9ac8373070956c3dcea03b","slot":null},{"block":null,"method":"eth_call","params":["0x9B977d504D94CF1efBEe30531392545FA55349Ab","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0x9B977d504D94CF1efBEe30531392545FA55349Ab","token1()"],"raw_result":"0x9b23573b156b52565012f5ce02cdf60afbaa70be","result_hash":"da2078997ab09b77440e0e7934ef425e11d7f8f9e15bda83b2a7fb414c57e03a","slot":null},{"block":null,"method":"eth_call","params":["0x9B977d504D94CF1efBEe30531392545FA55349Ab","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x9B977d504D94CF1efBEe30531392545FA55349Ab","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x9B977d504D94CF1efBEe30531392545FA55349Ab","factory()"],"raw_result":"Some(0xe0c4ceb92d08ca985bb70fe0a22feb121a9854a8)","result_hash":"317250863b6884b96004007b3587ad2dfee13451d926500b1fc9bac72405dd84","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","0x9B977d504D94CF1efBEe30531392545FA55349Ab"],"raw_result":"Some(\"42421949851\")","result_hash":"4fd9f52adaefb03231fb92412b7878b5466b5e8a2f4ac3677c7ad6f6c63605dd","slot":null},{"block":null,"method":"eth_call","params":["0x9b23573b156B52565012F5cE02CDF60AFBaa70Be","symbol()"],"raw_result":"Some(\"PENG\")","result_hash":"43fb909c4a1021fec8653161f7fd24bb76ff8fcc5610173b2abb3b53f058e3b8","slot":null},{"block":null,"method":"eth_call","params":["0x9b23573b156B52565012F5cE02CDF60AFBaa70Be","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x9b23573b156B52565012F5cE02CDF60AFBaa70Be","balanceOf","0x9B977d504D94CF1efBEe30531392545FA55349Ab"],"raw_result":"Some(\"467278812613750122020\")","result_hash":"eb5b9769c207f32fe02e498abb6684daa1c16d4faee690695e8a070bb1f118e4","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":"None","result_hash":"f2953d2931e36d0c55640f51865f8394ebe52194765d04e521017232558f871c","slot":null},{"block":null,"method":"eth_call","params":["0x9b23573b156B52565012F5cE02CDF60AFBaa70Be","symbol()"],"raw_result":"Some(\"PENG\")","result_hash":"43fb909c4a1021fec8653161f7fd24bb76ff8fcc5610173b2abb3b53f058e3b8","slot":null},{"block":null,"method":"eth_call","params":["0x9b23573b156B52565012F5cE02CDF60AFBaa70Be","name()"],"raw_result":"Some(\"Penguin Solutions • Robinhood Token\")","result_hash":"c7bb04adbb0aa5a58c823fa4e4959604eafb1d6c1c4b2c1e8c12310091f3afc6","slot":null},{"block":null,"method":"eth_call","params":["0x9b23573b156B52565012F5cE02CDF60AFBaa70Be","decimals()"],"raw_result":"None","result_hash":"f2953d2931e36d0c55640f51865f8394ebe52194765d04e521017232558f871c","slot":null},{"block":null,"method":"eth_call","params":["0x9b23573b156B52565012F5cE02CDF60AFBaa70Be","totalSupply()"],"raw_result":"Some(\"1740512100000000000000\")","result_hash":"a6303149dfe46d6f79f14515a8381d089dfb5c13263afab973287caf841d33c6","slot":null},{"block":null,"method":"eth_call","params":["0x9b23573b156B52565012F5cE02CDF60AFBaa70Be","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0x9b23573b156B52565012F5cE02CDF60AFBaa70Be","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x9b23573b156B52565012F5cE02CDF60AFBaa70Be","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0x9b23573b156B52565012F5cE02CDF60AFBaa70Be","decimals":18,"issuer":"Robinhood","last_checked":"2026-09-29T22:37:24Z","name":"Penguin Solutions","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"PENG"},"registry_hash":"d6272adf0af69a1c2c18f6a79db79616f69be8189283a420b5ba6e572aa0e4ad","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x9B977d504D94CF1efBEe30531392545FA55349Ab","ticker":"PENG","verdict":{"Verified":{"issuer":"Robinhood","ticker":"PENG"}},"version":1}

Signature

8Xb35KZxDnGiaYfFe63ITxCUJpHPEXtDOZjZKOorJIchqW2oIRAUxKcMgDNUnqeXdySDdmxCGGsim3oWZeErCA==

API call

GET /api/attest/81b764be634a929fa36bcb9cfeb2e56536917a90fdb66f2e0ada683a8257796a

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.