spaCy ( ) is an open-source software library for advanced natural language processing, written in the programming languages Python and Cython.Choi et al. (2015). It Depends: Dependency Parser Comparis
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 0xe22b44ca8043380e7ed3ccea544300b1260ae9765d05bcb1c9e555023049ac13. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28d964ab-f9ae-4ef9-bec3-437057b03464.json and https://artists.proofprofile.net/proofs/artist/28d964ab-f9ae-4ef9-bec3-437057b03464.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).