Max Ackermann (5 October 1887 – 14 November 1975) was a German painter and graphic artist of abstract works and representational art. thumb Life and work Born in Berlin on 5 October 1887, Ackermann
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0322ee8c96bed9d80cf0d9643d44c82c8f9bc59ed0b9084281eaf35bb0c3fe. 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/8be37206-7058-4359-b152-c6e705164d66.json and https://artists.proofprofile.net/proofs/artist/8be37206-7058-4359-b152-c6e705164d66.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).