Rodrigo Díaz de Vivar ( – 10 July 1099) was a Castilian knight and ruler in medieval Spain. Fighting with both Christian and Muslim armies during his lifetime, he earned the Arabic honorific ("the Lo
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 0xc6ce887c334597aca438edea5ebdf71b9f8b64b48288482dd75d9431c04610c6. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e4a5c47-33c8-4aac-8833-8881048a4610.json and https://artists.proofprofile.net/proofs/artist/7e4a5c47-33c8-4aac-8833-8881048a4610.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).