Vivian may refer to: Vivian (name), a given name and also a surname Places Vivian, Louisiana, U.S. Vivian, South Dakota, U.S. Vivian, West Virginia, U.S. Vivian Island, Nunavut, Canada Ballan
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 0x52878c4f663bb57020b793974d5c4f9074a497fee1c5ac962bb7f6c1f52b50e6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1fa5271-da3f-4e5a-9bb4-0c52923409dd.json and https://artists.proofprofile.net/proofs/artist/e1fa5271-da3f-4e5a-9bb4-0c52923409dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).