right|thumb|March 1941 issue. Jim Anthony, Super-Detective, was a fictional pulp magazine character published in Trojan Publications' Super Detective magazine. Jim Anthony was an attempt to create a
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 0xcb4e6422aff9f10b184c13f7e2bc124c070cffbe9be00c670fb5fede2a92225e. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a888b7d7-77b0-44c3-85a0-e7e1552f247e.json and https://artists.proofprofile.net/proofs/artist/a888b7d7-77b0-44c3-85a0-e7e1552f247e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).