"Layla" is a song written by Eric Clapton and Jim Gordon, originally recorded with their band Derek and the Dominos, as the thirteenth track from their only studio album, Layla and Other Assorted Love
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 0x2e76db9528dd5b7db04f8daab5b5435ff00caaed0bed6483207314030bdf2959. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7722a20d-bc12-4efc-9da2-613f3af67452.json and https://artists.proofprofile.net/proofs/artist/7722a20d-bc12-4efc-9da2-613f3af67452.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).