Resources
Crypto verification glossary
A concise glossary of terms used in crypto asset verification, proof of reserves, and Scrya certificates.
- Attestation
- A statement asserting a fact (for example that a balance exists). Without cryptographic binding to a wallet or account, attestations are weak evidence.
- BIP-137
- Bitcoin signed-message format used to prove control of legacy (1…), nested-segwit (3…), and native-segwit (bc1q…) addresses without moving funds. Scrya uses BIP-137 for Bitcoin wallet proofs; Taproot BIP-322 is not supported.
- Certificate fingerprint
- A SHA-256 hash of the canonical certificate payload, printed on the PDF so reviewers can detect later alteration of the recorded fields.
- EIP-191 / personal_sign
- Ethereum message-signing prefix ("\x19Ethereum Signed Message:\n") used across EVM chains to prove control of an address by signing a human-readable message.
- Ed25519
- A digital signature scheme used on Solana for proving control of an address via message signing. The Solana address is the public key.
- Non-custodial
- A design where the service never holds signing keys or the ability to move user funds. Scrya is non-custodial by design.
- Proof of assets
- Evidence that a specific party controls claimed crypto holdings at verification time — Scrya’s core product outcome for business ↔ customer workflows.
- Proof of reserves
- Evidence that claimed crypto assets exist and are controlled. Often used for exchange-wide publications; Scrya applies the same idea at client level.
- Proof of solvency
- Evidence that assets cover liabilities — a broader claim than proof of reserves alone.
- Read-only API key
- Exchange API credentials scoped so balances and account data can be read without permission to trade, transfer, or withdraw.
- TIP-191
- Tron’s message-signing scheme (TronLink signMessageV2) used to prove control of a Tron address without moving funds.
- Travel Rule
- AML requirements for VASPs to share originator/beneficiary information on transfers above thresholds; a wallet-control signature helps confirm a recipient controls an address.
- Verification window
- The bounded period after a wallet proof starts during which Scrya monitors the address via explorers/RPCs (24 hours on Scrya). Exchange checks are live API reads rather than a multi-hour window.
Keep reading
What is proof of reserves?
Proof of reserves is evidence that claimed crypto assets exist and are controlled. Scrya applies that idea at client level: prove wallet or exchange control, then issue a verification certificate.
Proof of reserves vs proof of solvency
Proof of reserves focuses on assets under control. Proof of solvency compares assets to liabilities. Professionals verifying a client’s holdings usually need ownership and balance evidence first.
How to verify crypto ownership without taking custody
You can confirm crypto ownership without taking custody: clients sign from their wallets or grant read-only exchange access, balances are checked, and results are sealed into a PDF certificate.