thumb|Romberg in 1949 Sigmund Romberg (July 29, 1887 – November 9, 1951) was a Hungarian-born American composer. He is best known for his musicals and operettas, particularly The Student Prince (1924)
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 0x3f018194418d150cfd60087a74527d94fecadb5a494df8abc0659de039b8338d. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/450e411a-5749-48cf-a88a-06b9d4b25a4f.json and https://artists.proofprofile.net/proofs/artist/450e411a-5749-48cf-a88a-06b9d4b25a4f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Romberg: Romberg Conducts Romberg, Vol. 2 (1945-1950)
Romberg: Romberg Conducts Romberg, Vol. 1 (1945-1951)
The Student Prince (Original Studio Cast of the First Complete Recording)
Sure on This Shining Night: The Romantic Song in America
Mario Lanza Sings Songs From The Student Prince and The Desert Song
Orchestral Introduction (From "The Student Prince") - 1989 Remastered
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 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 0x7aa6611ca5209b7da1d5d8d2e0e4367a1dadd51e1ff626edda6243728b9f207d. 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/USBC10400746.
Serenade (From "The Student Prince") - 1989 Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cf6cfdbf0af8102394bc9ccd1619550be7986b7c347ab86bb6a88ea11aa738. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USBC10400747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ec93aafcc5caac2b75d4773d80e1d6a4bfb2549e3e8281237617535c23e815. 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/USBC10400748.
Drink, Drink, Drink (From "The Student Prince") - 1989 Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc5eb3c628bb7e9a94a5e037e43bdcdc9031531ec4f7adec2388a492f54581b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USBC10400749.
Summertime in Heidelberg (From "The Student Prince") - 1989 Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225d829bf8df3be82955f2b95cc453fce8e0518cc7defd3b1c32f1a240d27dba. 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/USBC10400750.
Beloved (From "The Student Prince") - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0286cb7e5cdb321778c6d4b919adaf0cc12d131555a92f52c57c5fc80b703f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USBC10400751.
Gaudeamus Igitur (From "The Student Prince") - 1989 Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea90891a576c239d5c905b484e8aa4d0cfb86451e96975cadfe3d4ff70cffee. 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/USBC10400752.
Deep in My Heart, Dear (From "The Student Prince") - 1989 Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4917e99f7246b79f2348a43c1ff48decf300aefa1fd8d20d4ca80a4563d5f8. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USBC10400753.
I'll Walk with God (From "The Student Prince")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb31790fb1758f8baf3074726073a37e11b2e654971d44bd80ac6cea1d7cf24a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USBC10400754.
The Desert Song (From "The Desert Song") - 1989 Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4027d5e7663c12ea0c8b0e06e070eded9f9bec9642cb0c86067b7eaab8f92510. 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/USBC10400756.
The Riff Song (From "The Desert Song") - 1989 Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf68b2c87f33a027284699725759b4706231225af13f23926a1fd55bf83dc658. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USBC10400758.
Azuri's Dance (From "The Desert Song") - 1989 Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf784e5df66ef8fa9617b8f09698a4a8a5c2256e32d4cc6f7f447f275ab185552. 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/USBC10400762.
One Alone (From "The Desert Song") - 1989 Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e5cb2e581b684d0203135c6054357f82bb48800036aa5167a8f74a507956f3. 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/USBC10400767.
Up in Central Park (From the Musical ''Up in Central Park'')
Softly As In A Morning Sunrise (from 'The New Moon')
The Golden Age of Light Music: Nature's Realm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45676ccec613902ed76e7c28a46f83ee28c31360b5bc985d87c597fad91b78d5. 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/CH6631259412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1ddf4bf11ef995ceb7e127616561ea565f71162798a85318aeb6aafcb71efc. 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/ISZRU1010957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165d9a3a3e448b2c76fdde8ce365c458b129c3a835942693b8132011d55bb0d5. 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/USG3E0926718.