Masqualero (1983–1991) was a Norwegian jazz group. Originally named The Arild Andersen Quintet, the group soon changed its name to Masqualero Store Norske Leksikon (in Norwegian) in celebration of the
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 0xba1325f82e5112f76239cfa0f5f4e76f2e4a691332329c779547d5cc634931df. 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/74e3677a-17ea-45c6-bd9d-95262d68aa23.json and https://artists.proofprofile.net/proofs/artist/74e3677a-17ea-45c6-bd9d-95262d68aa23.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).