Habana Abierta is a Cuban band. They are part of a generation of composers, musicians, sculptors, authors, and actors that emerged in the early '90s with its own identity in Havana, even though some 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 0x3babeb7590111226209fc8d0d10973733657402252a5162176188c2f80d768d8. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23af58dd-d6f4-447a-bad9-9183f5a165d4.json and https://artists.proofprofile.net/proofs/artist/23af58dd-d6f4-447a-bad9-9183f5a165d4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).