thumb|Riddervold in 2019 Jeppe Riddervold is a Danish songwriter, entrepreneur, and music publisher. He is co-founder and CEO of JAM Company, and also founded Jelly Animation Sound Studios, a sound
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 0x0a103d806b8716fdf2c208f0601416279823df9acfe81c4b0a45eccad6f09725. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b14e6a3-58ec-4b7a-862e-988de1f490df.json and https://artists.proofprofile.net/proofs/artist/0b14e6a3-58ec-4b7a-862e-988de1f490df.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).