thumb|Marilia Andrés Casares Marilia Andrés Casares (born 17 December 1974 in Cuenca) is a Spanish singer-songwriter. Since she was a child, she showed a great interest in music and in the last cours
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 0xf920ada2b672919aee8f0a57fbee33dcf0601cb6152b69a46d3f32ae955051d4. Chain 2 (Bitcoin): anchored in block 954502 (2026-06-20T05:07:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c140f37-583d-4c16-84d6-64f6f249d7aa.json and https://artists.proofprofile.net/proofs/artist/9c140f37-583d-4c16-84d6-64f6f249d7aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).