Querbeat are a German pop band formed in Bonn (Germany) in 2001. They tour mainly around Germany but they also perform at festivals across Europe, primarily in Austria, Switzerland, and Spain, the Net
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 0x144fb548c81daf40cd837ff34ae4277e84fe83f271ac8d66f6abad7227fd1319. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d188aa3-4aba-46dc-8e17-c5f861c8cdae.json and https://artists.proofprofile.net/proofs/artist/1d188aa3-4aba-46dc-8e17-c5f861c8cdae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).