Sandra Tavares Pires Nascimento (born 16 June 1973) is a Brazilian retired beach volleyball player. She won the gold medal in the inaugural women's beach volleyball tournament at the 1996 Summer Olymp
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 0x1de5f38f90289213897a17ca73c4ee4594a2ba515b4d9700e9549829b9155209. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f0356dd-e4bb-4974-8aee-342457591146.json and https://artists.proofprofile.net/proofs/artist/7f0356dd-e4bb-4974-8aee-342457591146.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).