Anthony Grant Barrand (April 3, 1945 – January 29, 2022) was a British-born American folk singer and academic. He was a Professor of Anthropology, College of Arts and Sciences, Boston University, wher
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 0xb286893f435e3c776e20484056353adbe47d9fc988ae731ed2886473760c0cdb. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f64854a2-8607-4c9c-affc-ff04de36ee4b.json and https://artists.proofprofile.net/proofs/artist/f64854a2-8607-4c9c-affc-ff04de36ee4b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).