"Blueberry Hill" is a popular American song published in 1940 and first recorded and released by Sammy Kaye in 1940 on RCA Victor. It is best remembered for its 1950s rock and roll version by Fats Dom
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 0x4fc3371550eabe0793c3475772f73fae0df41d36e4d8f175928d8c038c71983d. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf3bf28d-a9a6-4f0d-9f2f-19b3287b0497.json and https://artists.proofprofile.net/proofs/artist/bf3bf28d-a9a6-4f0d-9f2f-19b3287b0497.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Roll out the Barrel: 101 Singalong Wurlitzer Hits