The Four Freshmen are an American male vocal quartet founded in the barbershop tradition. Its influences include the big band vocal group sounds of The Modernaires, The Pied Pipers, and The Mel-Tones.
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 0x1a755d40f790fc48d460af74969912a18c03d1dfc4700f7a0d78003379491dad. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b970ea0-d962-4280-8913-6673dff23f9f.json and https://artists.proofprofile.net/proofs/artist/6b970ea0-d962-4280-8913-6673dff23f9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x3953e051a352489f8d41808933aaac3fdc9ea44f8b74219105a69b260091eda2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBBLY0604314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9923ad59524f5041286067cad37e1b40290de8417222cbd3ac72660728946c. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GBBLY0604319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70bd86cfcd6a3a1167dbfb121f62ed7639ba2ab527e2510dbc84a7cdd226e6a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBBLY0604325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316e2cc673c9617ed412cf66d3f148ac43de1cbfd96997be9957609d0e7544e4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBBLY0604326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734a7b26b39b89571a2918e6af95ef6f1ca57dd67cbf2d1bf35924f4781f1ac8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEUE12522896.
How Can I Tell Her / Day by Day (feat. Dick Reynolds and His Orchestra) [Mono Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef13f54262b1f2501cced905791a977492e2fb66a87d077df37202f560769c55. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USCA20002193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1e26fe95af5a68c448daeedbf1b194fdfe0da5f91da1da5273cc535de57b3c. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USCA20002183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbeeaed1c19d9971798d4e885d4a8e1e4c4c805e9be70bf3af318919b3d0ca3. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:41:49Z), 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/USCA20002188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a236272bb7dcf5718817b103422f54b6c81077445d3be141ea4e5402712fce. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USCA20002187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacee6b0a6d7b08a3c48dd6f3e849bacf5a9e3ef887cd30cc80ffda65af9c5edf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCA20002186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0843bce1a251d6fdd5d795cc432d0edc8f5fbe75b7534e57640a2dcd20705ba9. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USCA20002181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a362f0b98d9de9633ad435f9f9f04aeed652158ea574b982ef479cad79465b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCA20002166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cbb29f979aa8d67e1d16983cf3031eeb3412086e0c8dd65fc929c9f7b653b9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USCA20002168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0798adcde308cd57659534af5ddbf94584a34573e366cf99d84ee61ae1cf65d5. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USCA20002173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdba6b513eb5e83ebe480fcf3e4e661b1f61487b9b0cc83b56dc32ee4cd9c8d. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USCA29501895.
Voices in Latin (feat. Pete Rugolo and His Orchestra) [Mono Version]
Liza (feat. Pete Rugolo and His Orchestra) [Mono Version]
The Last Time I Saw Paris (Mono Version)
Vintage Vocal Jazz / Swing No. 186 - EP: Somebody Loves Me
Opus One (feat. Dick Reynolds and His Orchestra) [Mono Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c217255935cba58f751dbb3da2324db710f39052abedda29026ca0d83c561d. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/USCA28901273.
Poinciana (Song Of The Tree) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b8ddf0ac52db6bf406674192187a53835cd429b2548c21e9ff2dc593a2ce76. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:26:33Z), 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/USCA28901274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a106ba66c592bc595f65a87231f00daa6e1268bf931d2f7ab4db7e7b0608860. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USCA28901278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf691e063f24b22ae3489e9cd69e613759e2daf227e07546e91782488b5e8a58. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USCA29000693.
The Four Freshmen - Live At Butler University
Great Gentlemen Of Song / Spotlight On The Four Freshmen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803b51498425ebb160aac70fb34ce5867bec4371434211013eff700d783e5766. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:06:41Z), 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/USCA29501904.
Four Freshmen And Five Guitars And Voices In Brass
Absolutely The Best of The Four Freshman
And 5 Trombones + and 5 Saxes (Bonus Track Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6b79707316610ecb7285ad74c0691cd775a8471db9b6120caa9072cdb075d5. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/GBDAG1201997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5197f3f93237efea9a19719b6bc0158f9404e272d604f8488cd17edb9ac75ef9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USTDZ1211001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310886a0b8361582062f16e08b240586ca46e585a1d5b61afdc04094b285b291. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USTDZ1211007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa35069ddab7a24405485406a74a9c022bcbed8bc166e2c2a76b386428ebe8f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR6V81388232.
The Four Freshmen: 5 Trombones & 5 Trumpets
Day by Day (Ultimate Legends Presents Four Freshmen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f4b8703cd81d484adf593ed14e5a4f5c049a189060561c84098d992b4a0c20. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM9AA1517232.
Four Classic Albums (The Four Freshmen & Five Saxes / In Person / The Swingers / Stars in Our Eyes) (Digitally Remastered)
Les idoles de la musique américaine : The Four Freshmen, Vol. 1
Les Idoles De La Musique Américaine: The Four Freshmen, Vol. 2
フレッシュメン・フェイヴァリッツ
Two of a Kind: The Four Freshmen & Margaret Whiting
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421b970caf24c66b3dc4572b030775128547fe099eeda0b2fb585803099cc9fd. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QM9A92097782.
Two of a Kind: The Four Lads & The Four Freshmen
Essential Classics, Vol. 92: The Four Freshmen
The Four Freshmen Featuring Emmet Cohen. Russell Hall, & Kyle Poole, Vol. 1
The Four Freshmen Featuring Emmet Cohen, Russell Hall, & Kyle Poole, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8b90e775d734de9e720a578cefc49df61e62688cc6ad5a85712aa996187d45. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:54:37Z), 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/QZRP42555776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2a38cb90fe8c80a6b2376157f8c9a518b1d39395c7cdfa69cbb6c583ca85bd. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZRP42555778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135481fa77f833eb185b494f130a6831748a1a3c0dfb57510ed194cd4b7ab8f6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZRP42555780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa054fc9fe682abdc5d1699c4553e2435234f9cdf0cdc0e5ae22080ec0b2dc6. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZRP42555782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b79f6e0a9770f9521471237caaad0ebf6242cd00ecaa454484ef4705c95c21. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:54:50Z), 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/QZRP42555783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1274d5d0af69cd3f2e6f77cf69b11f4f2740719c7961ce65a741f4e86f89a365. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZRP42555784.
The Four Freshmen Live - Celebrating 50 Years (A Waze Clearwater Jazz Concert)