Heidemann is a German surname. Notable people with the surname include: Britta Heidemann (born 1982), German épée fencer Dirk Heidemann (born 1961), German ballroom dancer, fashion model, now author,
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 0x13f43783358ea9c52f57f0502b2779786049ede8720a202f0f01ce748e6b18bd. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ba8424f-7060-418e-8f0f-87a93ca2e49b.json and https://artists.proofprofile.net/proofs/artist/9ba8424f-7060-418e-8f0f-87a93ca2e49b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).