John Patrick Cowsill (born March 2, 1956) is an American musician, best known for his work as a singer and drummer with his siblings' band the Cowsills. He has been a drummer and vocalist for the Beac
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1dceb92ebbc07d6c8ce77068ae21b43169711788febb9c78c3c10ec86d8a72. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06ef4826-492a-4cd7-9091-91f7dbec18ca.json and https://artists.proofprofile.net/proofs/artist/06ef4826-492a-4cd7-9091-91f7dbec18ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).