El César is a Mexican biographical television series that premiered on Space on 18 September 2017, and concluded on 11 December 2017. Based on the life of legendary Mexican boxer Julio César Chávez. T
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488442d2a19d49e028fb5aac06f26cbf006a5ff16485287d0f0eb52d866b14e0. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4159e1ae-24a5-4f8b-8732-08364cadf1a5.json and https://artists.proofprofile.net/proofs/artist/4159e1ae-24a5-4f8b-8732-08364cadf1a5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).