How EdTech Companies Use Blockchain

Verifiable Credentials — How It Works:

1. Issuer (e.g., an edtech platform) creates a credential.
2. It hashes the credential data.
3. The hash is stored on blockchain (or anchored to it).
4. The credential itself (with the hash) is shared with the student.
5. Employer or verifier checks the hash on-chain.
6. If the hash matches, the credential is authentic.

Common standards:
- W3C Verifiable Credentials
- Open Badges 2.0
- Blockcerts (used by MIT)

Why it works:
- No central database to hack or alter.
- Immutable proof of issuance.
- Universal verification across borders.

Verification Notes:

The student keeps the credential — usually
in a digital wallet.

Verification is a 3-step process:
1. Read the credential's hash.
2. Query the blockchain for that hash.
3. Compare issuer identity + status.

What makes it strong:
- Issuer can't fake revocation (it's on-chain).
- Student can't alter data (hash would change).
- Third parties can verify instantly.

What's still tricky:
- Issuer identity still needs trust roots.
- Data privacy for the credential content itself.
- Old certificates need retroactive migration.

Payments & Rewards — How It Works:

Micro-payments:
- Student pays per module ($0.50 – $5 per lesson).
- Payment settles on-chain in seconds.
- Creator gets paid immediately.

Token rewards:
- Complete a module → earn tokens.
- Tokens unlock premium courses or get redeemed.
- On-chain history proves the reward is real.

Smart contracts:
- Scholarships are released when conditions are met.
- Instructor payouts split automatically.
- Refund rules encoded directly in code.

Why it works:
- No middlemen taking 30% cuts.
- Works across borders.
- Transparent — students see where money goes.

Smart Contract Notes:

Common payout rules:
- 70% to instructor
- 20% to platform
- 10% to referral partner

Smart contract triggers:
- Course completion (verified by proof-of-learning)
- Attendance tracking
- Assessment pass events

Risks to design for:
- Bad oracles (fake completion signals)
- Contract bugs
- Regulatory compliance (KYC/AML)
- Volatility (use stablecoins)

Stablecoins are the safest way to build
payments in education for now.

Data Ownership — How It Works:

Decentralised Identity (DID):
- Student has a cryptographic key.
- Wallet holds identity + credentials.
- No password stored on a central server.

Learning Records:
- Progress is signed by the platform.
- Stored in student-controlled storage (IPFS, encrypted).
- Accessible only with student's key.

Consent:
- Student authorizes access to specific records.
- Consent can be revoked at any time.
- Platforms cannot resell data without permission.

Portability:
- Student moves between platforms.
- Records travel with them.
- No need to re-prove achievements.

Privacy & Compliance Notes:

What works well:
- W3C DID standards mature in 2025-2026.
- Selective disclosure (share only what's needed).
- Zero-knowledge proofs for verification without
  exposing data.

What's still hard:
- GDPR "right to be forgotten" vs immutable chain
  (solution: store hashes, not personal data).
- Key loss = permanent loss of credentials
  (solution: social recovery wallets).
- Institutional adoption lags — most schools
  still use centralised LMSs.

Best practice:
- Never store PII on-chain.
- Store only hashes + proofs.
- Keep personal data in off-chain storage.

Credential Examples:

1. MIT Blockcerts
   - MIT has issued blockchain-based diplomas
     since 2017.
   - Students can share them via a link.
   - Employers verify instantly on-chain.

2. Open Badges 2.0
   - Standard used by many training platforms.
   - Badges are verifiable, portable, and
     shareable on LinkedIn.

3. European Digital Credentials
   - EU initiative to standardise verifiable
     credentials across member states.

4. Holberton School
   - Uses blockchain-based certificates for
     software engineering graduates.

5. Learning Machine
   - Issues blockchain credentials for universities
     and enterprises.

Payment Examples:

1. BitDegree
   - Token-based rewards for completing courses.
   - Scholarships funded on-chain.

2. TeachMePlease
   - Blockchain marketplace for education.
   - Students pay in crypto for lessons.

3. ODEM
   - On-demand education marketplace.
   - Smart contracts for payments + credentials.

4. Coursera (exploration)
   - Experimented with blockchain verification
     for certificates.

Common patterns:
- Stablecoins dominate (USDC/USDT).
- Smart contracts handle payouts.
- Tokens for engagement, not for speculation.

Data Ownership Examples:

1. Learning Economy Foundation
   - Builds learner-owned data wallets.
   - Uses W3C standards.

2. Velocity Network Foundation
   - Aims to standardise education +
     employment credentials.

3. Open University (UK)
   - Piloting verifiable credentials for
     lifelong learning.

4. SkillWallet (early stage)
   - Wallet-based learner identity.

Common patterns:
- Wallets hold credentials + DID.
- Selective disclosure is the default.
- Cross-institution recognition is still
  the big unsolved problem.