Alexandra Barrese (born April 24, 1981) better known as Sasha Barrese is an American actress and professional poker player. She is best known for her role as Tracy Billings in The Hangover Trilogy. E
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 0xfe19e5c20a43c41fd99a2716fc10372e5b2a1aa0be4cd2608ecb6b321d42cff1. Chain 2 (Bitcoin): anchored in block 954031 (2026-06-17T01:43:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a6a6407-bb2f-4a10-b984-db28823bbd02.json and https://artists.proofprofile.net/proofs/artist/3a6a6407-bb2f-4a10-b984-db28823bbd02.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).