Does SLVon / Unknown 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":null,"chain":"solana","checked_at":"2026-10-19T03:05:36Z","dev":false,"expires_at":"2026-10-20T03:05:36Z","issuer":"Ondo","pool":{"base":{"address":"iy11ytbSGcUnrjE6Lfv78TFqxKyUESfku1FugS9ondo","balance":"3822736835","decimals":9,"symbol":"SLVon"},"chain":"solana","dex":"orca-whirlpool","pool":"HMVQDY2ShSxhm5brqqe4W9E63Br6WgSUhqoB524qaDmX","quote":{"address":"Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB","balance":"26238776","decimals":6,"symbol":null}},"quote_share_of_supply":0.00014212607569186268,"reads":[{"block":null,"method":"getSlot","params":[{"commitment":"confirmed"}],"result_hash":"c69f78ba659638fc1a6fc0e35883bc01630d85c1a0e282eec3aced7880e07914","slot":458677320},{"block":null,"method":"getAccountInfo","params":["HMVQDY2ShSxhm5brqqe4W9E63Br6WgSUhqoB524qaDmX",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":458677322},"value":{"data":["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","base64"],"executable":false,"lamports":5435765,"owner":"whirLbMiicVdio4qvUfM5KAg6Ct8VwpYzGff3uctyCc","rentEpoch":18446744073709551615,"space":653}},"result_hash":"2e6cc8b78e7ea8b69ef6a8fa64cae29fd90ec99b931ddac80817ce9166f4894d","slot":458677322},{"block":null,"method":"getTokenAccountBalance","params":["GiyxMM5dqyEWypMeT1qkzzSAw55ifUns2yNToe4crEyj",{"commitment":"confirmed"}],"result_hash":"d59f48c72ce2e1f31e2c377062f54cb2f158046c98e847385730c42c78dd133d","slot":458677323},{"block":null,"method":"getTokenAccountBalance","params":["7o5326MGpnKZxJCaV43GPrWphoDnBmi5BfX5Epi3gMvZ",{"commitment":"confirmed"}],"result_hash":"5a2a6a2156363639529451347721ee5c5c84a380443c3e461f533996377b9924","slot":458677324},{"block":null,"method":"getMultipleAccounts","params":[["iy11ytbSGcUnrjE6Lfv78TFqxKyUESfku1FugS9ondo","Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB"],{"commitment":"confirmed","encoding":"base64"}],"result_hash":"4627f7e5c7ffb8e85c81ea40ae86850dcf4d259bf643ba02870fc4a9a52f94b4","slot":458677325},{"block":null,"method":"getTokenSupply","params":["Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",{"commitment":"confirmed"}],"result_hash":"22f469544cc3d0462b734ce77bb1d054a9d4c67962b01ca5970ba1e26cea940e","slot":458677327},{"block":null,"method":"getAccountInfo","params":["Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":458677328},"value":{"data":["AQAAAAXqnPFs5BGY8aSZN8iMNwqU1K//ibW6y470XmMku3j3RO0wJF+kDQAGAQEAAAAF6pzxbOQRmPGkmTfIjDcKlNSv/4m1usuO9F5jJLt49w==","base64"],"executable":false,"lamports":213225287407,"owner":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","rentEpoch":18446744073709551615,"space":82}},"result_hash":"149e9d5bffe21e90f2268eb91e2e57de969d5165344fc97e94f5e54c31c25b07","slot":458677328},{"block":null,"method":"getProgramAccounts","params":["metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s",{"commitment":"confirmed","encoding":"base64","filters":[{"memcmp":{"bytes":"Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB","offset":33}}]}],"result_hash":"31706fe87562309c684f507a371c58de6f5c40445c2786c2a8d6f9e76d8b774e","slot":null},{"block":null,"method":"getTokenSupply","params":["iy11ytbSGcUnrjE6Lfv78TFqxKyUESfku1FugS9ondo",{"commitment":"confirmed"}],"result_hash":"ad649491d1d239ea8b542cdac37752e10521c6424980a7985810ca2deaddf538","slot":458677331},{"block":null,"method":"getAccountInfo","params":["iy11ytbSGcUnrjE6Lfv78TFqxKyUESfku1FugS9ondo",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":458677332},"value":{"data":["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","base64"],"executable":false,"lamports":58265177,"owner":"TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb","rentEpoch":18446744073709551615,"space":661}},"result_hash":"660393a5098a4d73fe6a2c41ef5ee3db0f1e1c40a0fa757e755aafcb6b027d80","slot":458677332},{"block":null,"method":"getProgramAccounts","params":["metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s",{"commitment":"confirmed","encoding":"base64","filters":[{"memcmp":{"bytes":"iy11ytbSGcUnrjE6Lfv78TFqxKyUESfku1FugS9ondo","offset":33}}]}],"result_hash":"4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945","slot":null}],"registry_entry":{"chain":"solana","contract":"iy11ytbSGcUnrjE6Lfv78TFqxKyUESfku1FugS9ondo","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T20:40:22Z","name":"iShares Silver Trust (Ondo Tokenized)","official_deployments":[{"address":"0xF3e4872e6a4cF365888D93b6146a2bAA7348F1A4","network":"Ethereum"},{"address":"0x8b872732b07be325a8803CDB480D9d20B6f8d11B","network":"BNB Chain"},{"address":"iy11ytbSGcUnrjE6Lfv78TFqxKyUESfku1FugS9ondo","network":"Solana"},{"address":"0xd53d98d13D93C817011645442c2e4d46E499B460","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":"SLV"},"registry_hash":"0bd20861acb250fc115ebe98f0dbbb7c686b15c772a071c9020aa5154f2d195f","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":458677320,"subject":"HMVQDY2ShSxhm5brqqe4W9E63Br6WgSUhqoB524qaDmX","ticker":"SLV","verdict":{"Verified":{"issuer":"Ondo","ticker":"SLV"}},"version":1}

Signature

gtEQu6C3wxBYSXbWP6MZQG8XoRx4LydbdblmJxsavnF5OwsIHt12Pw412+Fd16Hyh+FY4dUMKuEMXGCradd7Aw==

API call

GET /api/attest/9120cd8b442655a1d07bf9727cfbbd14f35c5c443acde42deaa3aee9d2ac0f5d

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.