Explanation
HCS provides ordered, timestamped, tamper-proof message records on the Hedera Hashgraph network. Unlike traditional databases, records written to HCS cannot be altered or deleted - not even by Borealis. This creates an independent verification layer that neither party can manipulate.
Why it matters
If certification records were stored only in a Borealis database, trust would require trusting Borealis to be honest. HCS removes that requirement - any party can independently verify a certification by querying Hedera mainnet directly.
How Borealis uses it
Two Hedera topics are active: the HCS Audit Topic (0.0.10382960) for immutable audit trails, and the HCS Data Topic (0.0.10382961) for trust score anchoring. Every certification and telemetry score is anchored with a Hedera transaction ID returned to the API caller. All operations run on Hedera mainnet.
See also