Joseph Michael Kramer (born June 21, 1950) is an American musician best known as the drummer of the hard rock band Aerosmith, which was inducted to the Rock and Roll Hall of Fame in 2001. Personal li
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 0x506dd5ae9b6a2f9384995efd597092d0316192ea6f86a0520b2a257a11b52438. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d320b7a7-14cd-4460-81c0-2fa7ab5785c0.json and https://artists.proofprofile.net/proofs/artist/d320b7a7-14cd-4460-81c0-2fa7ab5785c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).