Arthur Easterbrook Whittemore (June 3, 1896 – October 1, 1969) was a justice of the Massachusetts Supreme Judicial Court from 1955 to 1969. He was appointed by Governor Christian Herter. Whittemore w
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9622cd8482ce638b3bab235d0277a6a81b204ef07ae17b967e455f49bc5de343. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/badbbb04-5b56-4989-8008-3ee29a952c1e.json and https://artists.proofprofile.net/proofs/artist/badbbb04-5b56-4989-8008-3ee29a952c1e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Serenade for Solo Violin, String Orchestra, Harp, and Percussion (After Plato's 'Symposium'): I. Phaedrus; Pausanias (Lento; Allegro) - Live
Bernstein: Serenade (after Plato's Symposium) (Recorded 1990)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b707d7e055c3d15177ecbec19d50420f527d06e958c0037b396c264c7aca46. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7281775010.