Does BABAon / USDC match its issuer's published contract?

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":26223810,"chain":"ethereum","checked_at":"2026-10-19T03:03:39Z","dev":false,"expires_at":"2026-10-20T03:03:39Z","issuer":"Ondo","pool":{"base":{"address":"0x41765F0FCddC276309195166C7A62AE522FA09ef","balance":"35086181276278388741","decimals":18,"symbol":"BABAon"},"chain":"ethereum","dex":"uniswap-v3","pool":"0xF34bb48c19fD0a9e19680A82E60C13249584Bae3","quote":{"address":"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","balance":"541661788","decimals":6,"symbol":"USDC"}},"quote_share_of_supply":0.0024990016803119815,"reads":[{"block":26223810,"method":"eth_blockNumber","params":[],"result_hash":"adf4742061618f1ba067d15e021794d9abc42430a98a076dc2d07f2a62dc24b6","slot":null},{"block":null,"method":"eth_call","params":["0xF34bb48c19fD0a9e19680A82E60C13249584Bae3","token0()"],"raw_result":"0x41765f0fcddc276309195166c7a62ae522fa09ef","result_hash":"2b1d3d92a4e2a65c50d61dcdb8ce31735d4ff1062f3fc94356a9fe24db25a4a7","slot":null},{"block":null,"method":"eth_call","params":["0xF34bb48c19fD0a9e19680A82E60C13249584Bae3","token1()"],"raw_result":"0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48","result_hash":"6239f262cd1d947b947081c9eba6e8771378942478e1d48654f4f132ebb96021","slot":null},{"block":null,"method":"eth_call","params":["0xF34bb48c19fD0a9e19680A82E60C13249584Bae3","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xF34bb48c19fD0a9e19680A82E60C13249584Bae3","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xF34bb48c19fD0a9e19680A82E60C13249584Bae3","factory()"],"raw_result":"0x1f98431c8ad98523631ae4a59f267346ea31f984","result_hash":"24b698329e82b3994906dfbd01281d9a6f12f65aa59de65831657e6e928d4c80","slot":null},{"block":null,"method":"eth_call","params":["0xF34bb48c19fD0a9e19680A82E60C13249584Bae3","fee()"],"raw_result":"10000","result_hash":"328d48ab2376d2f42d3af5ba69086143c8f5fe883ed195a8280b2154a5711a33","slot":null},{"block":null,"method":"eth_call","params":["0x1F98431c8aD98523631AE4a59f267346ea31F984","getPool","0x41765F0FCddC276309195166C7A62AE522FA09ef","0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","0x2710"],"raw_result":"0xf34bb48c19fd0a9e19680a82e60c13249584bae3","result_hash":"2ff46689fa4559247763880571dd68a31a9afaf35a7700963d4c9abe5a962340","slot":null},{"block":null,"method":"eth_call","params":["0x41765F0FCddC276309195166C7A62AE522FA09ef","symbol()"],"raw_result":"Some(\"BABAon\")","result_hash":"88fd0ffe35e15bc97d13208a3146a62fef7880f95f33e0ef80941260983a1b16","slot":null},{"block":null,"method":"eth_call","params":["0x41765F0FCddC276309195166C7A62AE522FA09ef","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x41765F0FCddC276309195166C7A62AE522FA09ef","balanceOf","0xF34bb48c19fD0a9e19680A82E60C13249584Bae3"],"raw_result":"Some(\"35086181276278388741\")","result_hash":"040eb7d0c36726e6eb0264f6d1223ce53972e4a76d5f223a04337a5216f38dac","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","symbol()"],"raw_result":"Some(\"USDC\")","result_hash":"a3c9e246b0832b52e41efce041d8614251f5e288cdd4b192e85bfd3dfcb748ff","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","balanceOf","0xF34bb48c19fD0a9e19680A82E60C13249584Bae3"],"raw_result":"Some(\"541661788\")","result_hash":"16dfa6cbbdcdf0524fca0fe0f0e25d1c8eafdd021a2dbb8eb8133e0fe80c2bdd","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","symbol()"],"raw_result":"Some(\"USDC\")","result_hash":"a3c9e246b0832b52e41efce041d8614251f5e288cdd4b192e85bfd3dfcb748ff","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","name()"],"raw_result":"Some(\"USD Coin\")","result_hash":"fe94af15dc887a2c9df1fb0d6d276e6c586ca9d430ffeac0d05e4baee0637fd1","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","totalSupply()"],"raw_result":"Some(\"48174028472537007\")","result_hash":"582c425e5c525bea7c5581c116566a0b7cce990a3730e8fed25465543ba471cb","slot":null},{"block":null,"method":"eth_call","params":["0x41765F0FCddC276309195166C7A62AE522FA09ef","symbol()"],"raw_result":"Some(\"BABAon\")","result_hash":"88fd0ffe35e15bc97d13208a3146a62fef7880f95f33e0ef80941260983a1b16","slot":null},{"block":null,"method":"eth_call","params":["0x41765F0FCddC276309195166C7A62AE522FA09ef","name()"],"raw_result":"Some(\"Alibaba (Ondo Tokenized)\")","result_hash":"e13ea8e67211f8ed836e2e3458454d50d63386aa453202ccd048d69eda2e2289","slot":null},{"block":null,"method":"eth_call","params":["0x41765F0FCddC276309195166C7A62AE522FA09ef","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x41765F0FCddC276309195166C7A62AE522FA09ef","totalSupply()"],"raw_result":"Some(\"14040079105468287255439\")","result_hash":"233f74ff89b293548947746241c82763a9ab644d8eb012a080272be56c8aecf4","slot":null},{"block":null,"method":"eth_getCode","params":["0x41765F0FCddC276309195166C7A62AE522FA09ef","latest"],"result_hash":"8538a8190a64db88a5e0ec4c95f0129f9eecd6f3a3aacb869262b82d01d123ec","slot":null},{"block":null,"method":"eth_getCode","params":["0x41765F0FCddC276309195166C7A62AE522FA09ef","latest"],"result_hash":"8538a8190a64db88a5e0ec4c95f0129f9eecd6f3a3aacb869262b82d01d123ec","slot":null}],"registry_entry":{"chain":"ethereum","contract":"0x41765F0FCddC276309195166C7A62AE522FA09ef","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T20:40:22Z","name":"Alibaba (Ondo Tokenized)","official_deployments":[{"address":"0x41765F0FCddC276309195166C7A62AE522FA09ef","network":"Ethereum"},{"address":"0xd5964f3fcee8D649995AB88F04b8982539c282D2","network":"BNB Chain"},{"address":"1zvb9ELBFShBCWKEk5jRTJAaPAwtVt7quEXx1X4ondo","network":"Solana"},{"address":"0x799Bf997B733CAb2e1377D0411b63E35133991eb","network":"HyperEVM"}],"source":"https://docs.ondo.finance/addresses.md","source_url":"https://www.dropbox.com/scl/fi/qjfxyg748mx0dwi6up86d/EXTERNAL-Ondo-GM-Tokens-Ondo-GM-Tokens.csv?rlkey=n3no1w78wrah3umsl0nr9s77i&e=2&st=spdit2q1&dl=1","ticker":"BABA"},"registry_hash":"0bd20861acb250fc115ebe98f0dbbb7c686b15c772a071c9020aa5154f2d195f","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xF34bb48c19fD0a9e19680A82E60C13249584Bae3","ticker":"BABA","verdict":{"Verified":{"issuer":"Ondo","ticker":"BABA"}},"version":1}

Signature

dQeW0sRJpX14IuiWs7RNfpq8QcHM6jmw1ygjH+vFQWZsOHa5DKFVrk8gRHvTnfv/5I5CHi7pkHdX9Zhklu6gBg==

API call

GET /api/attest/49de2e5e94b84d6f1d4389d227fc4cb8e13b7584c5ae1649b5a3ed5f254fa15e

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.