Sandy & Junior were a Brazilian pop music duo consisting of siblings Sandy Leah Lima (born January 28, 1983) and Durval de Lima Júnior (born April 11, 1984). They first gained fame as the children of
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 0x6c281baf30bfa04d0870f9aacce6d174b5410c788456320d05095ca4ce3d6418. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/489ddfe5-6854-4ad6-9d64-78cdcbdbf993.json and https://artists.proofprofile.net/proofs/artist/489ddfe5-6854-4ad6-9d64-78cdcbdbf993.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).