QED
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QED certificate

QED record 8ff8176b26ad from . View the live pool page.

Verified · Ondo COST

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

The pool's quote contract matches Ondo's registry entry for COST.

Verified means the observed quote-token contract matches an issuer-published registry entry on Ethereum. Only the quote-side contract is checked.

This does not prove backing, custody, reserves, price, safety, solvency, or endorsement.

Signature valid · contract match

Ethereum Uniswap v4
Subject
COSTon / USDC · Ethereum
Pool address
0x1b32f65fe6ad3ab481f4184c178a07827b2ddaf61474e7b7abceab5e63a7fff5
Issuer match
Ondo · COST · View COST contracts
Checked
Valid until
Serial
8ff8176b26ad
Signed by
QED (key id GJWKkiUd)

After this time the certificate remains a historical record, but it no longer establishes current pool or registry state. Re-check to create a fresh observation before relying on current facts.

Compare this address with the one you were given before you trade.

0.02% Checked

Only trust an address you pasted here or opened from this page.

How to verify this yourself

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":26259129,"chain":"ethereum","checked_at":"2026-10-24T01:11:28Z","dev":false,"expires_at":"2026-10-25T01:11:28Z","issuer":"Ondo","pool":{"base":{"address":"0x0c8276E4FeC072cf7854Be69c70F7773D1610857","balance":"230889332468252615","decimals":18,"symbol":"COSTon"},"chain":"ethereum","dex":"uniswap-v4","pool":"0x1b32f65fe6ad3ab481f4184c178a07827b2ddaf61474e7b7abceab5e63a7fff5","quote":{"address":"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","balance":"240730839","decimals":6,"symbol":"USDC"}},"quote_share_of_supply":0.00018356538208941133,"reads":[{"block":null,"method":"eth_call","params":["0xbd216513d74c8cf14cf4747e6aaa6420ff64ee9e","poolKeys","0x1b32f65fe6ad3ab481f4184c178a07827b2ddaf61474e7b7ab"],"raw_result":"Object {\"currency0\": String(\"0x0c8276e4fec072cf7854be69c70f7773d1610857\"), \"currency1\": String(\"0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48\"), \"fee\": String(\"300000\"), \"hooks\": String(\"0x0000000000000000000000000000000000000000\"), \"tickSpacing\": String(\"6000\")}","result_hash":"ee4c59f9cbe0042103a487e8ed07916c393f954cd420dbf4da553e64ab048a0f","slot":null},{"block":null,"method":"eth_call","params":["0x7ffe42c4a5deea5b0fec41c94c136cf115597227","getSlot0","0x1b32f65fe6ad3ab481f4184c178a07827b2ddaf61474e7b7abceab5e63a7fff5"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x7ffe42c4a5deea5b0fec41c94c136cf115597227","getLiquidity","0x1b32f65fe6ad3ab481f4184c178a07827b2ddaf61474e7b7abceab5e63a7fff5"],"raw_result":"7455345921143","result_hash":"c0ae6a1b180890176c2e3e5f51dddaec612b0794a70f27d56e2aff3229cd417f","slot":null},{"block":null,"method":"eth_call","params":["0x0c8276E4FeC072cf7854Be69c70F7773D1610857","symbol()"],"raw_result":"Some(\"COSTon\")","result_hash":"f2e181ac6b127139d18f7d467934716d4a049d4e074a76554d677538d442f0d2","slot":null},{"block":null,"method":"eth_call","params":["0x0c8276E4FeC072cf7854Be69c70F7773D1610857","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","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":26259129,"method":"eth_blockNumber","params":[],"result_hash":"27e3153d3c7ce13f3d35fc1c38ea5c2654cb8a1a44ebb09175d1ffbecd47d595","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(\"47790538799322637\")","result_hash":"63f2f0947a26c5214f52bfbe16d731db7f7610e3372adf09274943ea271084a4","slot":null},{"block":null,"method":"eth_call","params":["0x0c8276E4FeC072cf7854Be69c70F7773D1610857","symbol()"],"raw_result":"Some(\"COSTon\")","result_hash":"f2e181ac6b127139d18f7d467934716d4a049d4e074a76554d677538d442f0d2","slot":null},{"block":null,"method":"eth_call","params":["0x0c8276E4FeC072cf7854Be69c70F7773D1610857","name()"],"raw_result":"Some(\"Costco (Ondo Tokenized)\")","result_hash":"ef83975e6df7b906ff43eca377c628ecb4957269282602b0f881fed95664cfe2","slot":null},{"block":null,"method":"eth_call","params":["0x0c8276E4FeC072cf7854Be69c70F7773D1610857","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x0c8276E4FeC072cf7854Be69c70F7773D1610857","totalSupply()"],"raw_result":"Some(\"1257804330207482365849\")","result_hash":"24fdde3d9bd8c49ef5f4e0ca5485fa9f699e54852d0a13e3ecc9466c94c25967","slot":null},{"block":null,"method":"eth_getCode","params":["0x0c8276E4FeC072cf7854Be69c70F7773D1610857","latest"],"result_hash":"8538a8190a64db88a5e0ec4c95f0129f9eecd6f3a3aacb869262b82d01d123ec","slot":null},{"block":null,"method":"eth_getCode","params":["0x0c8276E4FeC072cf7854Be69c70F7773D1610857","latest"],"result_hash":"8538a8190a64db88a5e0ec4c95f0129f9eecd6f3a3aacb869262b82d01d123ec","slot":null}],"registry_entry":{"chain":"ethereum","contract":"0x0c8276E4FeC072cf7854Be69c70F7773D1610857","decimals":null,"issuer":"Ondo","last_checked":"2026-10-23T20:11:46Z","name":"Costco (Ondo Tokenized)","official_deployments":[{"address":"0x0c8276E4FeC072cf7854Be69c70F7773D1610857","network":"Ethereum"},{"address":"0x34375f826fD3dD4E15F883d4F4786bB45eb705ac","network":"BNB Chain"},{"address":"6btaz134wjHkR8sqhAYrtSM6tavftfxnRvnyMd8ondo","network":"Solana"}],"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":"COST"},"registry_hash":"c16bf2edd5e9215b0e217be260876f6358938297b78d5480e9c49a93e5a83c6e","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x1b32f65fe6ad3ab481f4184c178a07827b2ddaf61474e7b7abceab5e63a7fff5","ticker":"COST","verdict":{"Verified":{"issuer":"Ondo","ticker":"COST"}},"version":1}
Signature
Pq9zJm+jdxpscIC1VrwcVLSh5+5lksL0MEGU9nbROej1D7K1LakKYHP1uTDAC5Xlr92XsCkBMCyQNgTKYiJ8DA==
API call
GET /api/attest/8ff8176b26ad6cc8740c8494bae5cfd80bf5fc17ff5b99c5e88a86008de3d07f
  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.