Roberto Enrique Vargas Vélez (May 29, 1929 – May 27, 2014) was a Puerto Rican pitcher in Major League Baseball and Negro league baseball. Vargas played for the Chicago American Giants for one season i
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 0x0223c72fd054b9ab8428c113c5fd5d49a0821faa26e7daab4f6df0d268e0e77a. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51b3f459-1bc8-402f-abc2-2676e034521f.json and https://artists.proofprofile.net/proofs/artist/51b3f459-1bc8-402f-abc2-2676e034521f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sólo Sé Que Fue Marzo (Versión instrumental)