1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb2081593970d744b2c4586c6add16979c862db071bef30432f22a30fe39abc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9088f434-bcee-489e-9a54-6c20bd7846e9.json and https://artists.proofprofile.net/proofs/artist/9088f434-bcee-489e-9a54-6c20bd7846e9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Día Internacional dels Drets Humans: 10 Desembre
Canten Giné: Homenatge dels Països Catalans