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 0x1d7f802f57e4730c23a83d52aa38719b84c34e6bd0cfbbbac138bee71bc1809e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d495d87-90e4-4b53-84a3-68bd39430a3b.json and https://artists.proofprofile.net/proofs/artist/5d495d87-90e4-4b53-84a3-68bd39430a3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hanning. Macht. Handball. (Geheimnisse aus dem Innersten eines faszinierenden Sports)