48 may refer to: 48 (number), the natural number following 47 and preceding 49 one of the years 48 BC, AD 48, 1948, 2048 48 (novel) 48 (magazine) "48", a song by Tyler, the Creator from the albu
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 0x3fe1e31459153a4a32164f565d11ecce8248e0578e05ef17271c164e6baa2656. 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/8fcc1d87-3c9e-4f64-b266-a3d69aaf71d2.json and https://artists.proofprofile.net/proofs/artist/8fcc1d87-3c9e-4f64-b266-a3d69aaf71d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).