Samuel Aguilar Alvarenga (16 March 1933 – 12 May 2013) was a Paraguayan football goalkeeper who played for Paraguay in the 1958 FIFA World Cup.1958 FIFA World Cup Sweden He also played for Club Libert
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 0x043f06993675371967a56b75c679158e96f0574d32c124b38b35416d59672c8d. 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/cc9aa8a8-5e1d-437b-bde3-063a6311aeb1.json and https://artists.proofprofile.net/proofs/artist/cc9aa8a8-5e1d-437b-bde3-063a6311aeb1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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