thumb|240px|Romy Haag (age unknown) Romy Haag (born 1 January 1948) is a Dutch dancer, singer, actress and former nightclub manager. In 1999, her autobiography Eine Frau und mehr was published, in whi
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 0x26d52da06b9ecacace9dc0ddac37f8514b84dbc4cbf07e9e044094a0651c3e89. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c723cfd5-78d2-44c3-ad03-64268f163304.json and https://artists.proofprofile.net/proofs/artist/c723cfd5-78d2-44c3-ad03-64268f163304.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).