Joe Barr (October 19, 1944 – July 11, 2008) was an American technology journalist, an editor and writer for the SourceForge sites Linux.com and IT Manager's Journal. A former programmer, Barr had wor
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 0x95b4778fdd425026dd5d1025e02865b9d512938c8f41613910adf0b99c3fed3c. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a222068c-e42d-4112-ab1a-baf0a3da2686.json and https://artists.proofprofile.net/proofs/artist/a222068c-e42d-4112-ab1a-baf0a3da2686.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).