James Maddalena (born 1954) is an American baritone who is chiefly associated with contemporary American opera. He gained international recognition in 1987 when he originated the role of Richard Nixon
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 0xaa7f9b2aeb4e3b370338605af3e3b74a62a77f6a466f8555893503da92ebb61b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4af3ec57-b450-4830-a9c3-a3c730ed9e67.json and https://artists.proofprofile.net/proofs/artist/4af3ec57-b450-4830-a9c3-a3c730ed9e67.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zaimont: Sacred Service for the Sabbath Evening (Excerpts) / A Tale of Abram and Isaac
Milken Archive Digital Volume 7, Digital Album 2
Mozart: Solemn Vespers of the Confessor & Coronation Mass
Solemn Vespers of the Confessor, K. 339: V. Laudate Dominum
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 0xeed7a5800a362e03c8aa18488b92eed8bae831c58663e52033894267aa32f4fb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM19002105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9d8d5bdd69e82ba5ceebc62cc890b3ba823bba97f37c98ef962a0f0df41301. 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/USHM19002107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0957c355e544ac33c165b2ba812bbeb88b2936fc0834bd0c91776936082f1847. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USNO19945301.
Adams: The Chairman Dances (Foxtrot for Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5561fea3476ee87bb6dd58e07e12dce2992c75d63c5ea4ffe8ce1886e7d71a5d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USNO18714401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a893ae35a8167011dce2092f85d1f436d717ee7ea370c36f19265cc38f9de21. 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/USNO19421904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57921b839709c11c9f78e4f759aa331551968015a25920f60084f18fb2471ace. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USNO18714402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c94138a1fcdcd19b2d07157f02ba6742f6aaa2b826c5631f1c4611e3531155. 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/USNO19421905.
Adams: Nixon in China, Act I, Scene 1: "The People Are the Heroes Now"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c2a0e9cc020ed96c22a53fd2dd31d14c2c5c2018596f38bb4c1d3c1ae3fee9. 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/USNO18817703.
Adams: Grand Pianola Music: On the Dominant Divide
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08823952b557a449a4b4e2a58e188991efe320f08a81eff581249fe82363535f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USNO19421906.
Adams: Nixon in China, Act I, Scene 1: Landing of the Spirit of '76
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9bce7e70b367df973bacd2e120c4aa63f4b83ecf94a975fa6f59ccf2a460fa. 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/USNO18817704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf9dba98d5d3d13423b87b44455a07b0e59c059995e6944c112f129347433e9. 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/USNO19636005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ddbad8156431b0252aca621c8a07a25f21597e958f213b6d64e2b3e1bf3d61. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USNO18921802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c2a0e9cc020ed96c22a53fd2dd31d14c2c5c2018596f38bb4c1d3c1ae3fee9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USNO18817703.
Dominick Argento: The Boor, Miss Havisham's Wedding Night, A Water Bird Talk
The Dharma at Big Sur: Pt. I - A New Day
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3012bd76e064b66db5b820cdbe32b05f130f58bbef958f404dbccc320c7f6ecc. 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/USNO10600824.
The Shakespeare Concerts Series, Vol. 6: No Enemy but Winter and Rough Weather
Foss: Elegy for Anne Frank / Song of Anguish / Beaser: The Heavenly Feast
Adolphe: Ladino Songs of Love and Suffering - Weisgall: Love's Wounded - Psalm of the Distant Dove - A Garden Eastward
Milken Archive Digital Volume 17, Album 7: Ode and Epics - Dramatic Music of Jewish Experience