thumb|Christian Gottlob Neefe Christian Gottlob Neefe (; 5 February 1748 – 28 January 1798) was a German opera composer and conductor. He was known as one of the first teachers of Ludwig van Beethoven
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 0x3721c8920b993f72ae5733be7413976e56ed0a30785fc49d0a35ab570e66b486. 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/6f2cfe6a-2daf-4ec0-85e8-69616425b0d3.json and https://artists.proofprofile.net/proofs/artist/6f2cfe6a-2daf-4ec0-85e8-69616425b0d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).