DOCUMENTS
Evidence storage
Document bytes remain off-chain and can be served through controlled gateway infrastructure.
CLOUD
The data plane for WaterChain evidence.
Store documents and operational metadata outside the blockchain while preserving cryptographic provenance through commitments and SHA-256 evidence.
Evidence Vault. Cloud is the off-chain evidence plane. Every document should remain traceable to a certificate, SHA-256 fingerprint and content reference without becoming the trust root.
FINGERPRINT
SHA-256
Evidence integrity is represented by a deterministic document digest before the commitment is anchored.
PROVENANCE
Operational mapping
Preserve certificate number, token ID, transaction hash, issuer, CID and lifecycle relationships.
Cloud is not the trust root. A storage migration should not require rewriting historical blockchain trust state.