Carlos Cardoso may refer to: Carlos Cardoso (journalist) (1951–2000), Mozambican journalist murdered in 2000 Carlos Cardoso (footballer) (1944–2025), Portuguese football manager Carlos Alexandre C
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 0x5a17f975434f52c76ee20f8ef8f28307fe34d6e3fc3ef3353e042c5870a3ff67. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2ecdbce-1bec-48ed-b031-93ca118b4367.json and https://artists.proofprofile.net/proofs/artist/d2ecdbce-1bec-48ed-b031-93ca118b4367.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).