USDG/BABA

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":81040554,"chain":"RobinhoodChain","checked_at":"2026-10-05T19:41:43Z","dev":false,"expires_at":"2026-10-06T19:41:43Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"25355096644","decimals":6,"symbol":"USDG"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0xa57ab582b310dd6f9e934EA1EEEa152741545E6A","quote":{"address":"0xad25Ac6C84D497db898fa1E8387bf6Af3532a1c4","balance":"359855163291168831261","decimals":18,"symbol":"BABA"}},"quote_share_of_supply":0.04460947703989593,"reads":[{"block":null,"method":"eth_getCode","params":["0xa57ab582b310dd6f9e934EA1EEEa152741545E6A","latest"],"result_hash":"fb98ae4f5f6e93ab50e0a3561c6a7bae14e6726d109df86a500fcd9491a28ee3","slot":null},{"block":81040554,"method":"eth_blockNumber","params":[],"result_hash":"ae737d81e3e3492141824cbed7352c05680f58bb5d4a44e40f4f6039ffbd4d07","slot":null},{"block":null,"method":"eth_call","params":["0xa57ab582b310dd6f9e934EA1EEEa152741545E6A","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xa57ab582b310dd6f9e934EA1EEEa152741545E6A","token1()"],"raw_result":"0xad25ac6c84d497db898fa1e8387bf6af3532a1c4","result_hash":"5b714e19fac4d1fff5393e0cbd2b7aaaeef00ed60e4e009e82a8ecf2ed6b0788","slot":null},{"block":null,"method":"eth_call","params":["0xa57ab582b310dd6f9e934EA1EEEa152741545E6A","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xa57ab582b310dd6f9e934EA1EEEa152741545E6A","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xa57ab582b310dd6f9e934EA1EEEa152741545E6A","factory()"],"raw_result":"Some(0x1f7d7550b1b028f7571e69a784071f0205fd2efa)","result_hash":"3a5325de1b5dc50662a9e2ec44d8428ded4306d2bd46195f62299474690e30aa","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","0xa57ab582b310dd6f9e934EA1EEEa152741545E6A"],"raw_result":"Some(\"25355096644\")","result_hash":"23cba21fc37a602ebf22f6c6a2233fe07db9eae08ab1198ce048d36ac9879e6c","slot":null},{"block":null,"method":"eth_call","params":["0xad25Ac6C84D497db898fa1E8387bf6Af3532a1c4","symbol()"],"raw_result":"Some(\"BABA\")","result_hash":"af0281c992ee029fba42f5ba384d2ca74ace6c1be5d7152aadb771be3d718be8","slot":null},{"block":null,"method":"eth_call","params":["0xad25Ac6C84D497db898fa1E8387bf6Af3532a1c4","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xad25Ac6C84D497db898fa1E8387bf6Af3532a1c4","balanceOf","0xa57ab582b310dd6f9e934EA1EEEa152741545E6A"],"raw_result":"Some(\"359855163291168831261\")","result_hash":"572fc03178b0bddd92ba48fbb0c03e003bd18fc25ff2f4310a4062839f002d36","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(\"721106358574957\")","result_hash":"9893ec47da9ed30d455021d81a5f3af7a866d9781d6e1ae90c528877171c8908","slot":null},{"block":null,"method":"eth_call","params":["0xad25Ac6C84D497db898fa1E8387bf6Af3532a1c4","symbol()"],"raw_result":"Some(\"BABA\")","result_hash":"af0281c992ee029fba42f5ba384d2ca74ace6c1be5d7152aadb771be3d718be8","slot":null},{"block":null,"method":"eth_call","params":["0xad25Ac6C84D497db898fa1E8387bf6Af3532a1c4","name()"],"raw_result":"Some(\"Alibaba • Robinhood Token\")","result_hash":"58683f7651039cf517494d5a5653034b51f6c822b13cb7e12acb6ea902d2d7da","slot":null},{"block":null,"method":"eth_call","params":["0xad25Ac6C84D497db898fa1E8387bf6Af3532a1c4","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xad25Ac6C84D497db898fa1E8387bf6Af3532a1c4","totalSupply()"],"raw_result":"Some(\"8066787310000000000000\")","result_hash":"826d9e670b2c0593a7b3e12dc18abd123c93df5aca3d40d039f67808506a01d8","slot":null},{"block":null,"method":"eth_call","params":["0xad25Ac6C84D497db898fa1E8387bf6Af3532a1c4","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0xad25Ac6C84D497db898fa1E8387bf6Af3532a1c4","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0xad25Ac6C84D497db898fa1E8387bf6Af3532a1c4","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0xad25Ac6C84D497db898fa1E8387bf6Af3532a1c4","decimals":18,"issuer":"Robinhood","last_checked":"2026-10-05T19:14:21Z","name":"Alibaba","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"BABA"},"registry_hash":"55fba90f8c6e3fe4097b4c31c358bee339fcaea1302dee4a406bf910dfc4a2de","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xa57ab582b310dd6f9e934EA1EEEa152741545E6A","ticker":"BABA","verdict":{"Verified":{"issuer":"Robinhood","ticker":"BABA"}},"version":1}

Signature

aNrskLrXhdTUtK09pjRWaJgxi2BpMOfJK0CYcieaKzkwdpzLXNE1DBwVu5PovYGssVYIKp8xfRmkjY3Ip7YSBQ==

API call

GET /api/attest/258212f87fbb6617cb8d4d29266198c238d3319cf3a300da1582d2a0e352c6d2

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.