Blockchain is a pretty open ended term. Seems in this case they use it to mean a git style history graph. From https://flur.ee/features/ https://flur.ee/featur

Blockchain is a pretty open ended term. Seems in this case they use it to mean a git style history graph. From https://flur.ee/features/ https://flur.ee/features/ : Secure every update with blockchain cryptography in a core immutable ledger. Tamper-proof blockchain (SHA3-256) for extreme data integrity Complete data traceability throughout history Provable audit trail into provenance and path of data Digital signatures cryptographically tied to every change