Michael Joseph Hossack (October 17, 1946 – March 12, 2012) was an American drummer for the rock band The Doobie Brothers. Biography Born in Paterson, New Jersey, Hossack was known as "Big Mike" to
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 0xfb3cd26b61ca06e1b5e0a49bec280f0dc862c949b019de4228cfa2be81278a12. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2669ea92-00f9-4be3-a44c-3a068d0825dc.json and https://artists.proofprofile.net/proofs/artist/2669ea92-00f9-4be3-a44c-3a068d0825dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).