Ana Cardoso can refer to: Ana Cardoso (actor) (1830–1878) Ana Cardoso (enslaved woman) (c. 1650–c. 1715) Category:Human name disambiguation pages
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 0xae97febb3a5765faa0d5d786c7f204db0fbfad558b4fbcde77d26979119e75fc. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea28073b-1781-47fa-a85c-b23c71621fc3.json and https://artists.proofprofile.net/proofs/artist/ea28073b-1781-47fa-a85c-b23c71621fc3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).