AMZN/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":76078605,"chain":"RobinhoodChain","checked_at":"2026-09-30T00:14:49Z","dev":false,"expires_at":"2026-10-01T00:14:49Z","issuer":"Robinhood","pool":{"base":{"address":"0x12f190a9F9d7D37a250758b26824B97CE941bF54","balance":"2413712746296618909835","decimals":18,"symbol":"AMZN"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0x8AC92DA74AB5F3b1d024Dc1943Ad7e15Dc4179Ef","quote":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"257746127027","decimals":6,"symbol":"USDG"}},"quote_share_of_supply":0.150119839542885,"reads":[{"block":null,"method":"eth_getCode","params":["0x8AC92DA74AB5F3b1d024Dc1943Ad7e15Dc4179Ef","latest"],"result_hash":"f8775d81fe57ba46b32782f7ab0453a50c5144d629042ebb9a4d8526b4325b24","slot":null},{"block":76078605,"method":"eth_blockNumber","params":[],"result_hash":"d69457c20a1ea842202109a1e80272b938d11f433f44d8ca0bdf925eac6dbeb2","slot":null},{"block":null,"method":"eth_call","params":["0x8AC92DA74AB5F3b1d024Dc1943Ad7e15Dc4179Ef","token0()"],"raw_result":"0x12f190a9f9d7d37a250758b26824b97ce941bf54","result_hash":"cdcc8970b64f933f7872e5cb92043fff47dbeeaff01d5e273c7852dabfa16dca","slot":null},{"block":null,"method":"eth_call","params":["0x8AC92DA74AB5F3b1d024Dc1943Ad7e15Dc4179Ef","token1()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0x8AC92DA74AB5F3b1d024Dc1943Ad7e15Dc4179Ef","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x8AC92DA74AB5F3b1d024Dc1943Ad7e15Dc4179Ef","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x8AC92DA74AB5F3b1d024Dc1943Ad7e15Dc4179Ef","factory()"],"raw_result":"Some(0x1f7d7550b1b028f7571e69a784071f0205fd2efa)","result_hash":"3a5325de1b5dc50662a9e2ec44d8428ded4306d2bd46195f62299474690e30aa","slot":null},{"block":null,"method":"eth_call","params":["0x12f190a9F9d7D37a250758b26824B97CE941bF54","symbol()"],"raw_result":"Some(\"AMZN\")","result_hash":"50beec0f9bd577699d512aab0dc9f9d79e9590a4865147d56f39cba0a08c3a25","slot":null},{"block":null,"method":"eth_call","params":["0x12f190a9F9d7D37a250758b26824B97CE941bF54","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x12f190a9F9d7D37a250758b26824B97CE941bF54","balanceOf","0x8AC92DA74AB5F3b1d024Dc1943Ad7e15Dc4179Ef"],"raw_result":"Some(\"2413712746296618909835\")","result_hash":"338ffe39b02e19f992d92975973f54d4d99dade87bf0d0956a28e5a88a97cd00","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","0x8AC92DA74AB5F3b1d024Dc1943Ad7e15Dc4179Ef"],"raw_result":"Some(\"257746127027\")","result_hash":"942ae648d03bcd1baa4a7b37a4e2a8662c4b5d2aedbc838d4514fabc7588b653","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 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Token\")","result_hash":"40e00ad45cd78f38212b4af0b2bf6550a5f02cefec35cb9c6223721becb81c46","slot":null},{"block":null,"method":"eth_call","params":["0x12f190a9F9d7D37a250758b26824B97CE941bF54","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x12f190a9F9d7D37a250758b26824B97CE941bF54","totalSupply()"],"raw_result":"Some(\"16078572650000000000000\")","result_hash":"00b68e1d8c47114ecbb4616fc9d191a462d1689cf5ca8f40b306fa7d9224cce1","slot":null},{"block":null,"method":"eth_call","params":["0x12f190a9F9d7D37a250758b26824B97CE941bF54","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0x12f190a9F9d7D37a250758b26824B97CE941bF54","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x12f190a9F9d7D37a250758b26824B97CE941bF54","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0x12f190a9F9d7D37a250758b26824B97CE941bF54","decimals":18,"issuer":"Robinhood","last_checked":"2026-09-29T23:37:24Z","name":"Amazon","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"AMZN"},"registry_hash":"b3f72fc9046ef9a37e433405d5916bce13581b85d8cce5889f24cf56e53b77b4","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x8AC92DA74AB5F3b1d024Dc1943Ad7e15Dc4179Ef","ticker":"AMZN","verdict":{"Verified":{"issuer":"Robinhood","ticker":"AMZN"}},"version":1}

Signature

Z7Xil2nQf1SMDa+9ig4gPa/gmW8ddr4UiF/ahg/ehGFCd7gZZ0aq6EWE3MAw2CxLZHBihLB2W8kbKw6N8vQkCw==

API call

GET /api/attest/78041074ea14c8effb7de1891b0f1d251ab6ff0961d824c8218c8970fa729278

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.