The SafeHouse is an American theme-restaurant that was established in 1966 in Milwaukee, Wisconsin. Filled wall-to-wall with spy memorabilia collected by the founder/owner, David J. Baldwin. Accordi
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 0x5c2c2a242a97036f3b8078d66af8b21b95e8e3750a00ab57e17f001d68d19d31. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c60837fd-1dd9-4bf1-9556-7156000f8411.json and https://artists.proofprofile.net/proofs/artist/c60837fd-1dd9-4bf1-9556-7156000f8411.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).