"Sleepyhead" is the debut single from American electronic band Passion Pit, featured on their first EP, Chunk of Change, and later on their debut album Manners. The single was released on September 8,
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 0x54987a83db112b947c75ad227328d3b9666131ba7f03988103e2a2178a968557. Chain 2 (Bitcoin): anchored in block 953996 (2026-06-16T20:04:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3028c168-cb37-45ce-86ad-cb70ec1f73b0.json and https://artists.proofprofile.net/proofs/artist/3028c168-cb37-45ce-86ad-cb70ec1f73b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).