Wicked Grin is the twenty-eighth studio album from blues singer John P. Hammond. The album is a collection of songs written by Hammond's friend Tom Waits, who produced the project. It was released in
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 0x0ef29a670cafab9e9899c69214cd10946b0bfe7c24c25d6956f71d2e70254ceb. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc3043a1-bf6d-4528-9101-615d12514880.json and https://artists.proofprofile.net/proofs/artist/fc3043a1-bf6d-4528-9101-615d12514880.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.