thumb|300x300px|The Original Duprees c.1962 (L to R), John Salvato, Michael Arnone, Joey Canzano, Joseph Santollo and Thomas Bialoglow. The Duprees are an American musical group of doo-wop style who h
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 0xe2d32e7e18304316e68a5c3dc031da27449db3d534907be201c2a3511170143d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c093e8f3-d2b8-4122-bf10-8c79a63126a4.json and https://artists.proofprofile.net/proofs/artist/c093e8f3-d2b8-4122-bf10-8c79a63126a4.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 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 0x01014d5b113a412ed150040e6ea8c94aa862fc45d138b2773b5630251a1c7758. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:03:10Z), 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/DEXO52495554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990803807108c8870b8219d49398e5e4a1530e0a84b16da8e50529ccfe8b21b4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEXO52495558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb319197bdd8710d8e7dc457c085daaccbb9bb30b04951f3b9abc62a16b0908e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USPB81010936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd51b15afcc9b204113706896aa139feef50f806ac1daf2ea2defd80a53234b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USPB81010939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243df36540e217604a5bb3839e0ea8a77dc586d534a6e1821c992a405434d6ec. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USPB81010956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83890d2e01c2fcd8a803ede09c5c10bb741339f70299555bfeb4e861edb6dff0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USPB81010957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b79fa204c0f363dc4e31264d764bf72a74c84cbf12fc6a931e548285333bfc1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USPB81010942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f975f09250af2265e3935114e166b6b3c3e2c695664c217594849ad4ba0f02e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USPB81010959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7d3b01580f490b9b6ae309a1979dd0fbd0f0766852c0fa6a576debc7c9e559. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USPB81010945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb82e8d8b174e5c6fa8ac7801eabd5a5379c4d97675e428448055b44f8aaf463. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/USCGJ1459437.
The Duprees - Their Very Best (Rerecorded)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233cbee89964615d24872624af73c96144124c52627fff812e954ea3b23cebbc. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:46:53Z), 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/USDEI8104212.
The Duprees Meet the Capris Doo Wop, Vol. 1
The Duprees Meet the Capris Doo Wop, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3606c72534a10e0ebf913d03fcda005a0c9c3eb74714a4ad7a6ee51ca59bac96. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USVC56200667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d7f46c18a7b34b0215c6738ba21c4a42856d626924f9b7d0996ec60a666b7a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USVC56200695.
The Duprees Do Doo Wop - [The Dave Cash Collection]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d883458d719737ae1a61c028cbdb216af9477cdf4c5d78522395d2cc7cd85b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USCGH1268598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4701ed7648b10507b692a76b19ac02cbb493a62a9b13a9f3a75169c865bacf3c. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USCGH1268602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf0f4b1a1e1e376b5b54989542e0d5bb9da0bec7511036575d39ab1917a8821. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USSM11608792.
The Coed Albums: You Belong to Me / Have You Heard
Top 26 Classics - The Very Best of The Duprees