thumb|right|Magnus Lindberg Magnus Gustaf Adolf Lindberg (born 27 June 1958) is a Finnish composer and pianist. He was the New York Philharmonic's composer-in-residence from 2009 to 2012 and the Londo
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 0xc10d3c5f63847a3e43214ddf3d74851d1e27b1362c976eda8f3306cffdf5491f. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85e0f3d1-a2bd-45bb-a764-492eafc9fe1d.json and https://artists.proofprofile.net/proofs/artist/85e0f3d1-a2bd-45bb-a764-492eafc9fe1d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Magnus Lindberg: Tempus fugit & Violin Concerto No. 2