Circuit City Corporation, Inc., formerly Circuit City Stores, Inc., was an American consumer electronics retail company, which was founded in 1949 by Samuel Wurtzel as the Wards Company, operated stor
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 0xb0bf4c9b6fe394d144f588304c53e061b06fb05cc03b1e8b21ffea1ea43e704d. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd0ef8c0-3695-42c9-8675-35a9e10c6548.json and https://artists.proofprofile.net/proofs/artist/fd0ef8c0-3695-42c9-8675-35a9e10c6548.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.