William Mockridge (born 28 July 1947) is a Canadian actor and Kabarett performer based in Germany. He is the founder of the Springmaus Theatre in Bonn. He became known to a broad public through his po
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 0xf002f2644d9a95697ef4d1dac55d4e9c576f323dc41829dc7ab6d91d45ec7d7b. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da5c2614-f540-4b54-8bb2-be3c1c097830.json and https://artists.proofprofile.net/proofs/artist/da5c2614-f540-4b54-8bb2-be3c1c097830.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).