Dan Arne Tillberg (born 9 April 1953 in Ystad) is a Swedish artist and producer. He is the son of Arne Tillberg and Ettie Tillberg.Sveriges befolkning 1970, (CD-ROM version 1.04) Sveriges Släktforskar
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c11f1cddc112949af4024787e242dea0360dd61d8aa9a01d74017c662c19842. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d47d245-ede2-4b42-8b0f-1458419a7dc1.json and https://artists.proofprofile.net/proofs/artist/3d47d245-ede2-4b42-8b0f-1458419a7dc1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).