Edwin James Costa (August 14, 1930 – July 28, 1962) was an American jazz pianist, vibraphonist, composer and arranger. In 1957, he was chosen as DownBeat jazz critics' new star on piano and vibes – t
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 0xa4004b9954c72db46d7d337259584323aa2fe7e09583fe8e4d12f1fbefa92ea2. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3aff232-33e8-438e-930e-a332c90e788e.json and https://artists.proofprofile.net/proofs/artist/e3aff232-33e8-438e-930e-a332c90e788e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Milestones of Legends Jazz Vibes, Vol. 7