Kapp or KAPP may refer to: Kapp (headcovering), a headcovering worn by many Anabaptist Christian women Kapp, Norway, a village in Østre Toten municipality in Innlandet county, Norway Kapp Records, a r
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 0x3eefd971d26276c4426d50c42a1b1f927ec0d49e2e3a831d3956790a891bd756. Chain 2 (Bitcoin): anchored in block 954038 (2026-06-17T02:57:22Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e66109b-0afc-4b4b-b213-92e2682896f9.json and https://artists.proofprofile.net/proofs/artist/3e66109b-0afc-4b4b-b213-92e2682896f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).