Does COINon / 比特币 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":128391781,"chain":"bnb","checked_at":"2026-10-18T16:09:35Z","dev":false,"expires_at":"2026-10-19T16:09:35Z","issuer":"Ondo","pool":{"base":{"address":"0x18d0e455B3491E09210292d3953157A4Bf104444","balance":"37216774500850653039281","decimals":18,"symbol":"比特币"},"chain":"bnb","dex":"pancake-v3","pool":"0x7De5f4a237315A7C8fd31974BB6603C1d965E9ac","quote":{"address":"0xf8589b526FdD65F7F301c605a6e04F0F1b4B3620","balance":"8644889368107218577","decimals":18,"symbol":"COINon"}},"quote_share_of_supply":0.00023914165663360313,"reads":[{"block":128391781,"method":"eth_blockNumber","params":[],"result_hash":"2c052b5722926905907b35676ee641ca76975f0a5e92454cba8f698ef5408a3c","slot":null},{"block":null,"method":"eth_call","params":["0x7De5f4a237315A7C8fd31974BB6603C1d965E9ac","token0()"],"raw_result":"0x18d0e455b3491e09210292d3953157a4bf104444","result_hash":"8bdef4b93a8e327bcf767bd3f339c81d34d1067224b7efa85403b3e3b14f0a6a","slot":null},{"block":null,"method":"eth_call","params":["0x7De5f4a237315A7C8fd31974BB6603C1d965E9ac","token1()"],"raw_result":"0xf8589b526fdd65f7f301c605a6e04f0f1b4b3620","result_hash":"fa6ddad25773c12620ea6616e4c01d02548d8de7c301b7e16a182c10fcf12c8a","slot":null},{"block":null,"method":"eth_call","params":["0x7De5f4a237315A7C8fd31974BB6603C1d965E9ac","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x7De5f4a237315A7C8fd31974BB6603C1d965E9ac","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x7De5f4a237315A7C8fd31974BB6603C1d965E9ac","factory()"],"raw_result":"0x0bfbcf9fa4f9c56b0f40a671ad40e0805a091865","result_hash":"2e3d0bedb6ff98db8ecf6c7b57f2028219517abe46f0f5212ff489a2c45cafbd","slot":null},{"block":null,"method":"eth_call","params":["0x7De5f4a237315A7C8fd31974BB6603C1d965E9ac","fee()"],"raw_result":"2500","result_hash":"c470156de4cb3620b0749c19d984d0666924d83d0ec37998dd6b637a87a2ec3b","slot":null},{"block":null,"method":"eth_call","params":["0x0BFbCF9fa4f9C56B0F40a671Ad40E0805A091865","getPool","0x18d0e455B3491E09210292d3953157A4Bf104444","0xf8589b526FdD65F7F301c605a6e04F0F1b4B3620","0x9c4"],"raw_result":"0x7de5f4a237315a7c8fd31974bb6603c1d965e9ac","result_hash":"3a7d097f1b39522dbb00a83be70893954f7c036376f4457fa346cdccf8ef4e2e","slot":null},{"block":null,"method":"eth_call","params":["0x18d0e455B3491E09210292d3953157A4Bf104444","symbol()"],"raw_result":"Some(\"比特币\")","result_hash":"713201f538a68ecc1b2cfb0b153ffa8a29f7202e140546ed5e41cd6217f174c0","slot":null},{"block":null,"method":"eth_call","params":["0x18d0e455B3491E09210292d3953157A4Bf104444","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x18d0e455B3491E09210292d3953157A4Bf104444","balanceOf","0x7De5f4a237315A7C8fd31974BB6603C1d965E9ac"],"raw_result":"Some(\"37216774500850653039281\")","result_hash":"0dc7e4828aa4d3c14d75d25e8f20bd909d30ec80ff6a0b194df11529a923bbb4","slot":null},{"block":null,"method":"eth_call","params":["0xf8589b526FdD65F7F301c605a6e04F0F1b4B3620","symbol()"],"raw_result":"Some(\"COINon\")","result_hash":"b497a864914ac6daa740013199f06c88bb67fc6e814b8326e74cbf572873bc5e","slot":null},{"block":null,"method":"eth_call","params":["0xf8589b526FdD65F7F301c605a6e04F0F1b4B3620","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xf8589b526FdD65F7F301c605a6e04F0F1b4B3620","balanceOf","0x7De5f4a237315A7C8fd31974BB6603C1d965E9ac"],"raw_result":"Some(\"8644889368107218577\")","result_hash":"de47ec4d4e1c657b2f7e63063d1f98c7d1b6c4c121940e2006b44bcdd3001359","slot":null},{"block":null,"method":"eth_call","params":["0x18d0e455B3491E09210292d3953157A4Bf104444","symbol()"],"raw_result":"Some(\"比特币\")","result_hash":"713201f538a68ecc1b2cfb0b153ffa8a29f7202e140546ed5e41cd6217f174c0","slot":null},{"block":null,"method":"eth_call","params":["0x18d0e455B3491E09210292d3953157A4Bf104444","name()"],"raw_result":"Some(\"比特币\")","result_hash":"713201f538a68ecc1b2cfb0b153ffa8a29f7202e140546ed5e41cd6217f174c0","slot":null},{"block":null,"method":"eth_call","params":["0x18d0e455B3491E09210292d3953157A4Bf104444","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x18d0e455B3491E09210292d3953157A4Bf104444","totalSupply()"],"raw_result":"Some(\"1000000000000000000000000000\")","result_hash":"9a5063c327faec672db6b50450571675cbfbcc3766ebaf6832c3a9f6636ff4d0","slot":null},{"block":null,"method":"eth_call","params":["0xf8589b526FdD65F7F301c605a6e04F0F1b4B3620","symbol()"],"raw_result":"Some(\"COINon\")","result_hash":"b497a864914a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(Ondo Tokenized)\")","result_hash":"2f6656aa1e674e14882ce26a9c8cbcd2f3a1439ed236401e41afcf921ac3f339","slot":null},{"block":null,"method":"eth_call","params":["0xf8589b526FdD65F7F301c605a6e04F0F1b4B3620","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xf8589b526FdD65F7F301c605a6e04F0F1b4B3620","totalSupply()"],"raw_result":"Some(\"36149659117534429621296\")","result_hash":"4c8bf794779e7a8f741ee3456bb1deee36b3564fc6bf1c976208f2a8364a72e4","slot":null},{"block":null,"method":"eth_getCode","params":["0xf8589b526FdD65F7F301c605a6e04F0F1b4B3620","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null},{"block":null,"method":"eth_getCode","params":["0xf8589b526FdD65F7F301c605a6e04F0F1b4B3620","latest"],"result_hash":"94608f5be99dad7eba2f1291156fff602e3d7e462e4517d8f65af38ba0f4b7b4","slot":null}],"registry_entry":{"chain":"bnb","contract":"0xf8589b526FdD65F7F301c605a6e04F0F1b4B3620","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T09:47:35Z","name":"Coinbase (Ondo Tokenized)","official_deployments":[{"address":"0xF042cfa86cf1D598a75Bdb55c3507a1F39f9493b","network":"Ethereum"},{"address":"0xf8589b526FdD65F7F301c605a6e04F0F1b4B3620","network":"BNB Chain"},{"address":"5u6KDiNJXxX4rGMfYT4BApZQC5CuDNrG6MHkwp1ondo","network":"Solana"},{"address":"0x639Bcd00422facAcA534063e3d860e8fcf78B46F","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":"COIN"},"registry_hash":"2bf13ff4020924ba1c74d8e732c3dd1609679a3b9a6dc8a796250beb0ae1b589","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x7De5f4a237315A7C8fd31974BB6603C1d965E9ac","ticker":"COIN","verdict":{"Verified":{"issuer":"Ondo","ticker":"COIN"}},"version":1}

Signature

cjrXH1AFYSAzwljpkMb+n+5Z+KXfSJWTQNdXLjZbV9EoD0qwY0luXvnnlK1j+yyekZ8qJ1r6+q5zWUz+bK+7BA==

API call

GET /api/attest/519f16139066e8aaa390826c7f65a7e5a14af80223b7267d75c1084822536931

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.