Stephen Arnold Mandell ( – March 14, 2018) was an American bluegrass guitarist and banjoist. Most notably, he is known for the 1973 instrumental hit "Dueling Banjos", recorded in duo with Eric Weissbe
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 0xd657ae4e936582c12576d42717a403cd3ee58aa152b02c27da25f4ecc2d4a917. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0e33dc1-bfa2-4fb0-9133-b3f7ded07f8f.json and https://artists.proofprofile.net/proofs/artist/b0e33dc1-bfa2-4fb0-9133-b3f7ded07f8f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).