Vivi may refer to: People Albert Vivancos (born 1994), commonly known as Vivi, Spanish footballer ViVi (born 1996), stage name of Wong Ka Hei, Hong Kong born singer based in South Korea, member 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 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 0xb5e20304b0a47e46e7b67fee553fb5fa717ff16b34d08be5e5ea573de2ae21ff. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/111d7d4c-00df-40aa-9c99-1aee3e437e78.json and https://artists.proofprofile.net/proofs/artist/111d7d4c-00df-40aa-9c99-1aee3e437e78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).