Manu Chao (; born José Manuel Tomás Arturo Chao Ortega on 21 June 1961) is a French-Spanish musician. He sings in French, Spanish, English, Italian, Arabic, Catalan, Galician, Portuguese, Greek, and 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 0x752fb85a4f84d01efdaa02af7787355968167d539258f8112d61be7fb533e929. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af3babc3-718d-4d06-8766-93174eff09c4.json and https://artists.proofprofile.net/proofs/artist/af3babc3-718d-4d06-8766-93174eff09c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).