David Castedo Escudero (born 26 January 1974), sometimes known as just David, is a Spanish former professional footballer who played as a left-back. He was known for his tenacity. He appeared in 255
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 0x6e6859dbbfdbbd017cb7ea2d051d2b5ea6f8a14b0ae17c9c463a82bb5f2fd53a. 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/640bd382-615d-4136-a87d-e5c86abe5be2.json and https://artists.proofprofile.net/proofs/artist/640bd382-615d-4136-a87d-e5c86abe5be2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nino Bravo el Musical, Su Vida, Su Musica