Chris Sheldon (born 25 September 1962) is an English record producer, particularly of rock music based in London, England. He has produced or mixed records for the Foo Fighters, Garbage, Big Country,
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 0x37d3f2936fab92d6788ab247a1d0a42c4ec33be6820bd7498d6c68a0bbff15f7. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/296c8366-cce3-4f58-a784-c2ae76cc2bf6.json and https://artists.proofprofile.net/proofs/artist/296c8366-cce3-4f58-a784-c2ae76cc2bf6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).