Bob Franke (July 25, 1947 – October 16, 2025) was an American folk singer-songwriter. Life and career Franke began his career in 1965, while a student at the University of Michigan, and performed at
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 0xcc170f21502285106055d0f24ece935afb6f8fcab7fd7b58eccaafd6433cefcf. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0298e2b8-b56c-473d-9486-118883eca224.json and https://artists.proofprofile.net/proofs/artist/0298e2b8-b56c-473d-9486-118883eca224.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).