Claes-Johan Rudolf Andersson (30 May 1937 – 24 July 2019) was a Swedish-speaking Finnish psychiatrist, author, poet, jazz musician, politician and member of the Finnish Parliament, representing the Le
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 0x5b93b4313d9a14de40f98ac3ae58c1c7a16620c5d8446f83dc925e46ce31b0ba. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3dfe362-058a-4e70-9b4d-69036487e15c.json and https://artists.proofprofile.net/proofs/artist/b3dfe362-058a-4e70-9b4d-69036487e15c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).