Natasja is a given name, and may refer to: Natasja Andreasen (born 2000), Danish handball player Natasja Crone Back, Danish journalist Natasja Saad (1974–2007), Danish rapper, deejay, and singer Nat
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 0x875f838c199efbbc41e5888eb9024c9f0ef92132289939190a6765f83b36ffdf. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11a13978-9f0d-4b97-9aa9-14ed70a1a06a.json and https://artists.proofprofile.net/proofs/artist/11a13978-9f0d-4b97-9aa9-14ed70a1a06a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).