Verifying Ownership
Prove you own the blockchain token linked to a product.
What Is Ownership Verification?
When a product is registered with TAGBASE and linked to a blockchain token (such as a Cardano native token), the current holder can cryptographically prove ownership by signing a message with their wallet.
This creates an immutable, tamper-proof record that you control the token—and by extension, the authentic product.
Supported Blockchains
Cardano
✅ Supported
Ethereum
🔜 Coming soon
Solana
🔜 Coming soon
Note: We are currently only supporting Cardano. Ethereum and Solana support will follow in the coming days.
How to Verify Ownership
Open a Claim
Navigate to a product page with a blockchain-linked claim
Click "Verify Ownership"
Connect Your Wallet
A signing window will open
Select your Cardano wallet (e.g., Eternl, Nami, Flint, Yoroi, Lace)
Approve the connection request
Sign the Challenge
TAGBASE generates a unique, time-limited message
Sign the message with your wallet (no transaction fees)
The signature proves you control the wallet holding the token
Verification Complete
Once verified, your ownership status is recorded
A green checkmark indicates successful verification
Wallet Requirements
To verify ownership, you need:
A compatible browser wallet extension installed
The wallet must hold the specific token linked to the product
The wallet must be unlocked and ready to sign
Supported Cardano Wallets:
Eternl
Nami
Flint
Yoroi
Lace
Typhon
GeroWallet
NuFi
Troubleshooting
Wallet not detected
Ensure your wallet extension is installed and enabled
Signing failed
Check that your wallet is unlocked and try again
Challenge expired
Request a new verification challenge
Token not found
Ensure the token is in the connected wallet address
Wrong network
Verify you're on the correct network (mainnet)
Security Notes
No private keys are shared—only a cryptographic signature
No transaction fees—signing a message is free
Time-limited challenges—each verification request expires for security
On-chain verification—signatures can be independently verified
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