Vivienne Marguerita Tendean Sumanti (born March 18, 1953) commonly known as Vivi Sumanti is an Indonesian actress, model, and singer who was most popular in the late 1960s and 1970s. Sumanti made her
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0ece0fad7906fb7184844aa33e10d3725fdc996dbeeb72173c9927c9ee82fd. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cdae495-5479-4447-b423-b842f3b5380b.json and https://artists.proofprofile.net/proofs/artist/5cdae495-5479-4447-b423-b842f3b5380b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).