The Woleet API provides an easy way to create **timestamped proofs of existence** and **timestamped proofs of signature** for your data. The data can be of any type and is not modified by the process: only its digital fingerprint is required, so that the data does not have to be disclosed to Woleet. Creating these two types of proofs is often referred as **data anchoring** and **signature anchoring** since it cryptographically links forever the data or its signature to a timestamped transaction present in an immutable blockchain.

The Woleet API also allows to create and manage customizable **signature requests** for your data. The data to sign can also be of any type and is not modified by the process: only its digital fingerprint is required, so that the data does not have to be disclosed to Woleet. The Woleet platform handles the full life cycle of the signature process. Each signature performed produces one proof of signature, and at the end of the signature process, a signature attestation PDF document containing all the proofs and the audit trail is produced and certified by Woleet.

Proofs created by Woleet are **linked to the Bitcoin blockchain** and so are independent from Woleet (an access to the Bitcoin blockchain and some open source code is enough to verify proofs). Using the Woleet API, you can thus create durable cryptographic proofs that can be used to prove that your data existed in a given state on a given date, and optionally was signed by a third party.

The Woleet API creates **proofs of existence** conform to the open source standard Chainpoint. Consequently, they can be verified using any tool compatible with this standard, without any interaction with Woleet, and so remain **verifiable forever** even if Woleet stops its operations.

The Woleet API creates **proofs of signature** that are an extension of the same standard proposed by Woleet. Thus, the existence and timestamp of a signature is verifiable using the same tools used to verify proofs of existence. When it comes to verifying the validity of the signature and the identity of the signer, some additional processing is performed: since it is fully performed client side with no additional data, proofs of signature remain **verifiable forever** even if Woleet stops its operations.