AMAT/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":75554752,"chain":"RobinhoodChain","checked_at":"2026-09-29T09:38:07Z","dev":false,"expires_at":"2026-09-30T09:38:07Z","issuer":"Robinhood","pool":{"base":{"address":"0x36046893810a7E7fCE501229d57dc3FC8c8716d0","balance":"2670546894886969210","decimals":18,"symbol":"AMAT"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0x846b5cF169c577654bC0DA8dAD0fe9A9fa409a82","quote":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"1496497252","decimals":6,"symbol":"USDG"}},"quote_share_of_supply":0.010510212617117355,"reads":[{"block":null,"method":"eth_getCode","params":["0x846b5cF169c577654bC0DA8dAD0fe9A9fa409a82","latest"],"result_hash":"8d20d422d5076c130c0dcda70127cf31543708009697489d046ae7ce699f62c0","slot":null},{"block":75554752,"method":"eth_blockNumber","params":[],"result_hash":"455206f8cf61fcb0f0750ec457638a095d8ed0bdbfe023fe21e354673c00b115","slot":null},{"block":null,"method":"eth_call","params":["0x846b5cF169c577654bC0DA8dAD0fe9A9fa409a82","token0()"],"raw_result":"0x36046893810a7e7fce501229d57dc3fc8c8716d0","result_hash":"ae12c9a253bbb3f9b821b0932dad7c4b712b2a3071ba4f122371d4a3892943fd","slot":null},{"block":null,"method":"eth_call","params":["0x846b5cF169c577654bC0DA8dAD0fe9A9fa409a82","token1()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0x846b5cF169c577654bC0DA8dAD0fe9A9fa409a82","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x846b5cF169c577654bC0DA8dAD0fe9A9fa409a82","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x846b5cF169c577654bC0DA8dAD0fe9A9fa409a82","factory()"],"raw_result":"Some(0x70fb47db7ca14a04cae64dd4bdc2e86c8656943d)","result_hash":"076868872c2d94137dd4514c2bcefdc7556ccdd7d6fdeba130f64550b7bd9f91","slot":null},{"block":null,"method":"eth_call","params":["0x36046893810a7E7fCE501229d57dc3FC8c8716d0","symbol()"],"raw_result":"Some(\"AMAT\")","result_hash":"62b1411dc538c79140a6f89d8145b7ffabd0ba6dde8630c6e062b662b91a026a","slot":null},{"block":null,"method":"eth_call","params":["0x36046893810a7E7fCE501229d57dc3FC8c8716d0","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x36046893810a7E7fCE501229d57dc3FC8c8716d0","balanceOf","0x846b5cF169c577654bC0DA8dAD0fe9A9fa409a82"],"raw_result":"Some(\"2670546894886969210\")","result_hash":"ae15ce11c26e5055d587686d544d60d46c35820a6eb671a1233aeac30163dba9","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","0x846b5cF169c577654bC0DA8dAD0fe9A9fa409a82"],"raw_result":"Some(\"1496497252\")","result_hash":"ada2c861a7d3e788274aa4ab94b21a116ae8934a3cf704d741cf398e81f7adf5","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(\"691416630955640\")","result_hash":"623bf0783709ab1f53a0d485da4fdcf1def56f3bf1af1b8781b00ad5f86cc1e7","slot":null},{"block":null,"method":"eth_call","params":["0x36046893810a7E7fCE501229d57dc3FC8c8716d0","symbol()"],"raw_result":"Some(\"AMAT\")","result_hash":"62b1411dc538c79140a6f89d8145b7ffabd0ba6dde8630c6e062b662b91a026a","slot":null},{"block":null,"method":"eth_call","params":["0x36046893810a7E7fCE501229d57dc3FC8c8716d0","name()"],"raw_result":"Some(\"Applied Materials • Robinhood Token\")","result_hash":"8b5901fe4931ba6e09f3823db8e83965f8c13b6e132feb6198e5a2e5af9b96cb","slot":null},{"block":null,"method":"eth_call","params":["0x36046893810a7E7fCE501229d57dc3FC8c8716d0","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x36046893810a7E7fCE501229d57dc3FC8c8716d0","totalSupply()"],"raw_result":"Some(\"254090663260000000000\")","result_hash":"d9b97f75e087ef9dd8fd68b4d886f2ace4c55b082054f616f05b405f7107a509","slot":null},{"block":null,"method":"eth_call","params":["0x36046893810a7E7fCE501229d57dc3FC8c8716d0","uiMultiplier()"],"raw_result":"1000044656302636618","result_hash":"54595674d8207772f05d8d7a96609f715b6f5acaa20ba2adb138be8e1ed1c636","slot":null},{"block":null,"method":"eth_getCode","params":["0x36046893810a7E7fCE501229d57dc3FC8c8716d0","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x36046893810a7E7fCE501229d57dc3FC8c8716d0","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0x36046893810a7E7fCE501229d57dc3FC8c8716d0","decimals":18,"issuer":"Robinhood","last_checked":"2026-09-29T09:07:51Z","name":"Applied Materials","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"AMAT"},"registry_hash":"9b23c9c0539374ace70a78512769898af2dd8afd4171afa32f303a3693710e35","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x846b5cF169c577654bC0DA8dAD0fe9A9fa409a82","ticker":"AMAT","verdict":{"Verified":{"issuer":"Robinhood","ticker":"AMAT"}},"version":1}

Signature

80wpZp4+O3aYjvUw22W53yYgL1gjvS4prTLZcP/TrGlhXNoxp1/tLf5d92G/MvwQhcBrq10ckyR9bsHxBauyCw==

API call

GET /api/attest/c7328b8fb70da644d0e48075f22d83f5a88a15fc194f8da06798c100cc2c8fff

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.