Margareta Ann-Christine Bärnsten (born 10 July 1957), is a Swedish singer and writer, who has written several detective stories. As a student Bärnsten attended the Adolf Fredrik's Music School, a hi
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 0x190ca37accc5f8e7e4b028caffe5a85d6cda1a362795351dd2300d2bb7496c44. 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/67bcd9af-6db8-4b97-8ec3-d9bc4ccdb6d8.json and https://artists.proofprofile.net/proofs/artist/67bcd9af-6db8-4b97-8ec3-d9bc4ccdb6d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).