Dagmar may refer to: People Dagmar (given name), a feminine Scandinavian and German given name Berthe Dagmar (1884–1934), French film actress Dagmar (actress) (1921–2001), main stage name of Ame
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 0x09a5a201981887443fb0f274f9e8f804fdf4c44c0f899b0fdab5829b28f8e7a4. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f2be30a-2a06-4a92-9b9c-8643e129a6e6.json and https://artists.proofprofile.net/proofs/artist/8f2be30a-2a06-4a92-9b9c-8643e129a6e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).