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AML check on Fantom Opera

Fantom Opera is the original Fantom EVM chain (chain ID 250). Sonic Labs announced its sunset for 30 June 2026, yet its public endpoint still returned new blocks on 4 October 2026.

Address format0x followed by 40 hexadecimal characters (EVM) · chain ID 250; the same address on Sonic (chain ID 146) has a separate history0x819104266244b9aa419cb400a43a011bdd71e869Example for illustration, not a real address.
Note

Sonic Labs says Opera's chain data and history are preserved, so funds that passed through Opera can still have a traceable past. Before relying on a result, check that your AML checker actually covers Fantom Opera (chain ID 250) rather than only Sonic.

Services that check Fantom Opera

01EllipticEnterprise platformPrice on requestSupportedNot scored
02Crystal IntelligenceEnterprise platformPrice on requestSupportedNot scored
03TRM LabsEnterprise platformPrice on requestSupportedNot scored
04ChainalysisEnterprise platformPrice on requestNot verifiedNot scored
05MetaSleuthWeb appFree web app · paid plans from $30/monthNot verified7.6
06Merkle ScienceEnterprise platformPrice on requestNot verifiedNot scored

How to check a Fantom Opera address

  1. Get the public addressAsk your counterparty for the address they will send from — or copy it from the incoming transaction.
  2. Pick a service that covers Fantom OperaChoose one marked “Supported” in the list above. Check the network, not just the address: the same 0x address on Fantom Opera and on Sonic has two separate histories, so make sure the checker screened the right chain.
  3. Run the check and read itTake extra care with funds linked to Multichain's Fantom bridge in July 2023; Chainalysis reports that Circle and Tether froze addresses holding some of those assets.
A real AML check needs only a public address. Never share a seed phrase or private key.

Fantom Opera specifics

  • As of 4 October 2026, the public Opera endpoint listed in Fantom’s docs (rpcapi.fantom.network, chain ID 250) still returned new blocks, the latest being block 123,550,036 at 11:57 UTC that day.[1]
  • Fantom Opera mainnet uses chain ID 250 and its native currency symbol is FTM.[2]
  • Opera runs on a consensus engine called Lachesis: validators agree on the order of transactions without a single leader, using a DAG (a web of linked event blocks) designed to keep working correctly even if some participants are faulty or dishonest (Byzantine fault tolerance).[3]
  • Sonic Labs let FTM holders upgrade to Sonic's S token on a 1:1 basis through its official upgrade portal; transaction fees (gas) on Fantom Opera are paid in FTM, so users had to keep a small amount of FTM to make the upgrade.[4]
  • Sonic launched on 18 December 2024; swaps between FTM and S worked both ways until 31 March 2025, and after that only one way (FTM to S).[5]
  • In April 2026 Sonic Labs announced it was sunsetting Fantom Opera: validators had already moved, users were told to finish transfers on Opera or the Opera FTM-to-S bridge before 5:00 PM GMT on 30 June 2026, while Opera chain data and history stay preserved and the ERC-20 FTM-to-S route and Sonic Gateway remain supported.[6]
  • Chainalysis reported that on 6 July 2023 more than $125 million was withdrawn from Multichain without authorisation, nearly $120 million of it from Multichain's Fantom bridge, including wrapped ETH, wrapped BTC and USDC; it said the attacker likely obtained enough of the bridge's MPC (shared-key) keys to move the funds.[7]
  • According to the same Chainalysis report, Circle and Tether froze several addresses holding assets withdrawn from Multichain, about $65 million in total, so those funds could not be moved or swapped.[8]
  • The Fantom Foundation said the July 2023 Multichain bridge exploit drained over $210 million in assets across several chains, and that Fantom's ecosystem took about one-third of the total losses.[9]
  • The Fantom Foundation won a default judgment against Multichain in the General Division of the High Court of Singapore on 30 January 2024 (effective 30 November 2023), and said it had filed police reports in Singapore and in Kunming, China, where Multichain and its founder are subject to an active investigation.[10]

Common risks on Fantom Opera

Stolen fundsHighCoins taken in hacks of exchanges, protocols or personal wallets.DeFi protocolLowEstablished on-chain lending, swaps and liquidity pools.Enforcement actionHighEntities under active legal proceedings or seizure orders.

FAQ

Is Fantom Opera still running?

Sonic Labs announced in 2026 that it is sunsetting Opera, calls it legacy infrastructure, and told users to finish transfers on Opera and the Opera FTM → S bridge before 5:00 PM GMT on 30 June 2026. As of 4 October 2026, Opera’s public endpoint still returned new blocks, but its validators and ecosystem have moved to Sonic, so don’t rely on Opera for new transfers.

Can I still swap FTM for S?

The official upgrade was 1:1. Swaps worked both ways from 18 December 2024 to 31 March 2025, then only from FTM to S. Sonic Labs said the Opera FTM-to-S bridge would close with Opera's retirement, while the ERC-20 FTM-to-S route and the Sonic Gateway stay supported.

What was the Multichain incident?

In July 2023, Multichain's bridge lost over $210 million across several chains, according to the Fantom Foundation, which said Fantom's ecosystem took about one-third of the losses. Chainalysis reported that nearly $120 million came from Multichain's Fantom bridge, including wrapped ETH, wrapped BTC and USDC.

How do I check a Fantom Opera address for AML risk?

Copy the public address, open one of the services listed above that supports Fantom Opera, and run the check. You never need a seed phrase or private key.

What does “Not verified” mean?

The service claims support somewhere — in marketing copy or a third-party page — but its own docs, pricing or FAQ do not list the network. Treat it as unknown.

Sources

  1. Fantom Foundation — Fantom Opera public endpoints (queried 4 Oct 2026) (4 Oct 2026). Checked 4 Oct 2026.
  2. Fantom Foundation (docs.fantom.foundation) — Public Endpoints. Checked 4 Oct 2026.
  3. Fantom Foundation — A Brief Intro to Lachesis Consensus Engine (29 Oct 2020). Checked 4 Oct 2026.
  4. Sonic Labs — The Ultimate Sonic Upgrade Handbook — FTM to S (31 Dec 2024). Checked 4 Oct 2026.
  5. Fantom Foundation (docs.fantom.foundation) — Sonic Migration — Overview. Checked 4 Oct 2026.
  6. Sonic Labs — Sonic's Successful Network Migration: What This Means for Fantom Opera (7 Apr 2026). Checked 4 Oct 2026.
  7. Chainalysis — Multichain Exploit: Possible hack or rug pull (10 Jul 2023). Checked 4 Oct 2026.
  8. Chainalysis — Multichain Exploit: Possible hack or rug pull (19 Jul 2023). Checked 4 Oct 2026.
  9. Fantom Foundation — Fantom Foundation Awarded Default Judgement Against Multichain (4 Mar 2024). Checked 4 Oct 2026.
  10. Fantom Foundation — Fantom Foundation Awarded Default Judgement Against Multichain (4 Mar 2024). Checked 4 Oct 2026.