Emilio Menéndez del Valle (born 20 June 1945 in Madrid) is a Spanish politician and diplomat and Member of the European Parliament for the Spanish Socialist Workers' Party, part of the Party of Europe
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 0xdccb98b40beeed2f3e4f7fb982989b0677a7109df018d968e29b6f973ad76220. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f2388a6-bec5-4d7a-9b6b-d15070f20715.json and https://artists.proofprofile.net/proofs/artist/3f2388a6-bec5-4d7a-9b6b-d15070f20715.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Músicos y compositores asturianos, Vol. 2, en la voz de Emilio Menéndez
Antología de Avilés: un Siglo de Canciones y Costumbres, Vol. 1