5 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
Prove you had this sha256 at this time: signed receipt with its position in neo's public log, anchored daily on Bitcoin (OpenTimestamps) and Software Heritage.
FractalAI Notary: pay for an independent ML-DSA-65 attestation of an x402 settlement.
Ysaere Agent Page Stamp — $0.02 USDC, no account needed. Input: {"url":"https://example.com/page"}. Fetches that public https page and returns a signed hash of the bytes. The page is not stored. A blocked or failed fetch...
Signed proof of what a web page said: give a URL, get its text, screenshot and TLS details with a timestamped cryptographic signature anyone can verify.
Breached password check: is this password in known data breaches, and how often? Send only the SHA-1 hash (never the password); just the first 5 characters reach Have I Been Pwned (k-anonymity). Up to 50 hashes per call.