MJ may refer to: Fictional characters M.J. Delfino, in Desperate Housewives Mary Jane Watson, in Marvel comics Mary Jane Watson (2002 film series character), the film adaptation of the character
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 0x80b463b308528b0c2cd04b7fb1ddea392066107175c84af1ae384e1aa5cc1d81. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e915530-43c0-4e7b-947a-26e2af430a59.json and https://artists.proofprofile.net/proofs/artist/5e915530-43c0-4e7b-947a-26e2af430a59.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).