Björn Thomas Hellberg (29 September 1941 – 22 January 2023) was a Swedish actor, director and screenwriter. He graduated from the Malmö Theatre Academy in 1968. His film debut was Maria (1975).BFI.or
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 0xc2a3c001ceb48491b1b08b51779b891270be6e366e7e2b936bab8c998c0d8ec1. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a373951b-c984-4b01-af2c-6fb059ce7758.json and https://artists.proofprofile.net/proofs/artist/a373951b-c984-4b01-af2c-6fb059ce7758.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).