Niva or NIVA can refer to: Places Niva (river) in the Murmansk Oblast, Russia Nivå, a town in Denmark Nivå station, railway station in Denmark Niva (Prostějov District), a village in the Czech Re
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 0xfcd767f3fc67b6329fb295076fb02a4286ef8ccd8903beb4e1a107c73a1c208c. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c868a9bd-f79f-4e67-a24d-e3081e9e1321.json and https://artists.proofprofile.net/proofs/artist/c868a9bd-f79f-4e67-a24d-e3081e9e1321.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).