Blockchain Anchoring

Blockchain anchoring is the practice of periodically publishing the current state (typically the latest hash) of an internal log or audit trail to a public blockchain. Once published, the hash is immutable on the blockchain — it cannot be retroactively altered without an attack on the blockchain itself.

Why this matters: anchoring makes post-hoc tampering of the internal log detectable without trusting the internal logger. Even if an attacker compromised your system and rewrote your audit trail, the rewritten state would not match the previously-anchored hash.

In Papyrus, blockchain anchoring is available on Enterprise plans. The chain-head hash of the audit trail is published daily to a public anchor (typically Ethereum mainnet via a low-cost transaction). External auditors can verify integrity by computing the hash and comparing.

See also

• Hash Chain
• Audit Trail