Davix is an open-source client for WebDAV and Amazon S3 available for Microsoft Windows, Apple MacOSX and Linux. Davix is written in C++ and provide several command-line tools and a C++ shared library
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c032237cb82b6d6de08c5752bcd7deaaa1ec6134570d4207cbd7695c70e276. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/861cba89-79bb-45d3-9fcb-3f3df2a84132.json and https://artists.proofprofile.net/proofs/artist/861cba89-79bb-45d3-9fcb-3f3df2a84132.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).