Johann Baptist Joseph Maximilian Reger (19 March 187311 May 1916) was a German composer, pianist, organist, conductor, and academic teacher. He worked as a concert pianist, a musical director at the L
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 0x9bac0dc9e7e59644994a989a9d4e2d2ff0bd0f2e5ccdc09612d7e954b0f5d2f0. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/806ec23c-261a-4f75-8527-ae676d539129.json and https://artists.proofprofile.net/proofs/artist/806ec23c-261a-4f75-8527-ae676d539129.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).