Is it signed by the source (exchange, transfer agent, custodian) or a reputable aggregator? Can I trace it? Attestations: Auditor‑signed proofs (NAV, reserves, liabilities) posted on-chain or referenced via authenticated APIs. Bonus points for cryptographic attestations (TEEs, ZK) that prove integrity without leaking sensitive details.
https://cryptolinks.com/news/understanding-the-role-of-oracles-in-defi

