Barta may refer to: Bárta/Barta, a surname Pen name of David Korner (1914–1976), Romanian and French communist militant, trade unionist and journalist Barta, Bangladesh, a village in southern-central
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 0xf57353a1de055c8ba36fcba5231075a378b50862bdd95d335e9003ec7c402245. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d8dee5b-6d7d-4827-a9cb-1ef697600798.json and https://artists.proofprofile.net/proofs/artist/0d8dee5b-6d7d-4827-a9cb-1ef697600798.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).