The Sounds are a Swedish indie rock band. Formed in Helsingborg in 1998, the group's musical style has been compared to new wave acts such as Blondie, The Cars, the Epoxies and Missing Persons. Their
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab75f74700cebf9ec4ef185257b64cfb1046dce60c9d06609360e1af9aefd183. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1999085a-c83f-4769-968e-7ec0320a0f9a.json and https://artists.proofprofile.net/proofs/artist/1999085a-c83f-4769-968e-7ec0320a0f9a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).