Barbosa or Barbossa may refer to: People Barbosa (surname) Wesley So's maternal family name under Philippine name conventions is "Barbossa", i.e. "Barbossa" is the maiden name of So's biological m
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 0x6e39e5ffbe53ca4c27beda260d0b7a7d6b898bcb28c3b7022dc669223538cf9b. 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/1a338f9e-44a1-4b88-95b8-5730baca5ce4.json and https://artists.proofprofile.net/proofs/artist/1a338f9e-44a1-4b88-95b8-5730baca5ce4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).