thumb|MFF Support logo MFF Support is the official fan club for Swedish football club Malmö FF. Founded on 1 November 1992, it has 2,195 members as of January 2014. Based on the number of members it
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 0x5c86a3f5aa029d9c34a766e932cf463d963e26988ab63a89cc9851dbc363d29c. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a89d7ec0-d6a4-42c7-8e26-2e54f1f80a06.json and https://artists.proofprofile.net/proofs/artist/a89d7ec0-d6a4-42c7-8e26-2e54f1f80a06.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).