"Hey Brother" is a dance song by Swedish DJ and record producer Avicii from his debut studio album, True (2013). American bluegrass singer Dan Tyminski provides vocals for the track. It was written by
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 0x75740c40163d99a721b06c9c1b3a00d08b5bfbb6c8547951114ae04bd0e0212b. Chain 2 (Bitcoin): anchored in block 953928 (2026-06-16T10:21:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1df1fe39-fe68-4851-a7d0-cfd44d1ade50.json and https://artists.proofprofile.net/proofs/artist/1df1fe39-fe68-4851-a7d0-cfd44d1ade50.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.