Johann Stadlmayr (or Stadelmayer) (born perhaps around 1580 Fétis gives 1560; Junkermann & Schmitt in NG prefer 1580 as a round figure, citing his description in 1619 as young and lively. probably in
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 0xf63fc3ae39e13277a14e13d5ba79eb3e5b735265b6a673b54adad7dc17650fd5. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e46aa0a-63e9-4c12-9b3b-83025c1a6270.json and https://artists.proofprofile.net/proofs/artist/0e46aa0a-63e9-4c12-9b3b-83025c1a6270.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).