AJ, or variants, may refer to: Arts, entertainment and media Fictional characters Applejack (My Little Pony: Friendship Is Magic), a character from the fourth incarnation of My Little Pony A. J. (
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 0x67c07822911313382bac72fab39d55896333cb6144787f403ea0894f60d92eb5. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd0e13e5-4adc-4241-ab98-ce53ceb452ef.json and https://artists.proofprofile.net/proofs/artist/fd0e13e5-4adc-4241-ab98-ce53ceb452ef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).