Erik Martin Andreas Ask-Upmark (born 13 May 1973) is a Swedish musician and riksspelman on the svensk säckpipa (Swedish bagpipe). He mainly performs with the groups Svanevit, Dråm and Falsobordone in
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 0xbe30e6c131935be2441ca7e88056b8b5afb001206288712ba0494025b040ed7e. 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/67a56943-e93a-4d91-a42e-84bf822933ac.json and https://artists.proofprofile.net/proofs/artist/67a56943-e93a-4d91-a42e-84bf822933ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).