Cesar or César may refer to: Arts and entertainment César (film), a 1936 French romantic drama César (play), a play by Marcel Pagnolt Fictional characters Notable fictional characters Cesar,
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 0xb8368afa95bf8565bfdcf327005f0ba8ff18aa6d9b29e3150102a5c92eb0db28. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb99a546-5734-4b9f-95e8-a6da3ec6b2fc.json and https://artists.proofprofile.net/proofs/artist/cb99a546-5734-4b9f-95e8-a6da3ec6b2fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).