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 0xf26d3e1b7b5be6ed989765a825ddae42f5579de0ec9948949778d01aba9e268f. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f63b2b6f-7312-4df3-ae5e-fd0a557da13c.json and https://artists.proofprofile.net/proofs/artist/f63b2b6f-7312-4df3-ae5e-fd0a557da13c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Milton Brown and His Musical Brownies Selected Favorites Volume 9
Milton Brown and His Musical Brownies Selected Favorites Volume 4
Milton Brown and His Musical Brownies Selected Favorites Volume 1
Milton Brown and His Musical Brownies Selected Favorites Volume 3
Milton Brown and His Musical Brownies Selected Favorites Volume 8
Milton Brown and His Musical Brownies Selected Favorites Volume 7
Milton Brown and His Musical Brownies Selected Favorites Volume 5
Milton Brown and His Musical Brownies Selected Favorites Volume 6
Milton Brown and His Musical Brownies Selected Favorites Volume 2
Milton Brown and His Musical Brownies Selected Favorites, Vol. 2
Milton Brown and His Musical Brownies Selected Favorites, Vol. 4
Milton Brown and His Musical Brownies Selected Favorites, Vol. 5
Milton Brown and His Musical Brownies Selected Favorites, Vol. 3
Milton Brown and His Musical Brownies Selected Favorites, Vol. 7
Milton Brown and His Musical Brownies Selected Favorites, Vol. 8
Milton Brown and His Musical Brownies Selected Favorites, Vol. 1