WWaterChainWhitepaper
WATERCHAIN BLOCKCERTS · RESEARCH EDITION

Trust, designed for
verifiable reality.

A hybrid cryptographic architecture for verifiable credentials — keeping private evidence off-chain while preserving durable, independently verifiable proof.

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Research Edition v5.2September 2026PDF · 174 KB
WATERCHAINRESEARCH / 05.2
BLOCKCERTSTrust,
anchored.

Hybrid cryptographic architecture for privacy-preserving verifiable credentials.

PRIVATE
EVIDENCECRYPTO
BRIDGEPUBLIC
PROOF
WCB · RESEARCH EDITION2026
READING GUIDE

Inside the paper.

Move through the architecture, cryptographic bridge, credential lifecycle, production baseline and privacy model — or open the original PDF reader.

01
ARCHITECTURE

Proof and data
have different jobs.

WaterChain separates durable public proof from private credential evidence through a cryptographic bridge. The blockchain anchors compact commitments and lifecycle state; documents, personal information and operational metadata remain off-chain.

OFF-CHAIN

Data & Privacy

Documents, personal information, certificate numbers, salts, CIDs, databases, APIs and user interfaces.

BRIDGE

Cryptographic Bridge

SHA-256 evidence and salted keccak256 commitments connect private evidence to public state.

ON-CHAIN

Trust Layer

Issuer identity, commitments, lifecycle state, timestamps, authorization state and immutable events.

02
CRYPTOGRAPHIC RELATION

The blockchain does not need
to store the document.

Integrity and persistence are deliberately separated. A document can live in controlled storage or IPFS while a compact cryptographic commitment anchors its integrity on-chain.

INTEGRITY PATHDOCUMENTSHA-256SALTED COMMITMENTAVALANCHE
PERSISTENCE PATHDOCUMENTIPFS / STORAGECIDDOCUMENT GATEWAY
Certificate commitmentkeccak256(abi.encode(certificateNo, certificateSalt))
03
CREDENTIAL LIFECYCLE

A credential is a
state machine.

Issuance, claim, validity, revocation, reinstatement and cryptographic erasure remain distinguishable lifecycle states.

01ISSUEDCredential created
02CLAIMEDRecipient authorized
03REVOKEDValidity withdrawn
04REINSTATEDValidity restored
05ERASEDTerminal state
04
PRODUCTION BASELINE

The current
trust baseline.

PROTOCOLWaterChain Blockcerts
NETWORKAvalanche C-Chain · 43114
CONTRACTv3.6.3 · 30603
INTEGRITYSHA-256
PERSISTENCEIPFS / CID + Cloud
VERIFICATIONWalletless
CERTIFICATE FORMATWCB-WWWW-XXXX-YYYY-ZZZZ
GOVERNANCEOwnable2Step · Issuer Registry
DEPLOYED CONTRACT0x8e587876Aa16320D482E35C0ECf3f8744313fDE6View on-chain ↗
05
PRIVACY

Privacy by minimizing
what becomes durable.

Plaintext names, email addresses, documents and similar personal information are intended to remain off-chain. Salted commitments reduce direct disclosure but do not automatically eliminate linkage risk.

01Keep personal data off-chain

Use the blockchain for proof, lifecycle state and authorization rather than document storage.

02Separate deletion from erasure state

Cryptographic erasure records a terminal invalid state; corresponding off-chain data must still be deleted according to retention policy.

03Treat compliance as deployment-specific

GDPR/KVKK alignment depends on roles, lawful basis, retention, rights and operational controls.

06
LIMITATIONS

Trust is not
the same as truth.

Cryptographic anchoring establishes provenance and consistency of the anchored representation. It does not prove that an issuer's real-world assertion is factually true.

Research edition.Security claims are proof sketches rather than machine-checked proofs. Independent audit, adversarial testing, formal verification and operational security review remain appropriate for high-assurance deployments.
DOCUMENT READER

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