Carmen Conde Abellán (15 August 1907 – 8 January 1996) was a Spanish poet, narrative writer and teacher. In 1931 she founded the first Popular University of Cartagena, along with her husband Antonio O
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 0x2584d3d9c55ce08d123688093c31182c3a62e3519e951286ca350ad163da78de. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08b665e7-c3b5-4bba-a8a5-594e1725410f.json and https://artists.proofprofile.net/proofs/artist/08b665e7-c3b5-4bba-a8a5-594e1725410f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).