The El Dorados were an American doo-wop group, who achieved their greatest success with the song "At My Front Door", a no. 1 hit on the US Billboard R&B chart in 1955. History The group formed in Chi
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 0x51bc6558f54beac722f3f7e8d49376acb55490eba6cdd10a779beaf48a1ce526. 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/4b824c8c-46c5-4f41-9b76-9007019ff4c3.json and https://artists.proofprofile.net/proofs/artist/4b824c8c-46c5-4f41-9b76-9007019ff4c3.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 0xe19f6b2e11e97ee77d5df59e3581ad582579276d4fed2e45ef2c6f8c81aea94c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:37:22Z), 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/QM6MZ1857050.
The El Dorados Meet the Du Droppers Doo Wop
Beyond Patina Jazz Masters: The El Dorados
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84efea209a9f7fd2bc0f4c34e504438cd5d5411e21f6d2a72ab7451e95699c7. 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/AUXN22157298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182234284ff089f9b4f594ff45ce581ad1c8d442f636fc0e5986d766b306a635. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:52:47Z), 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/AUXN22157304.
Top 25 Classics - The Very Best of The El Dorados
Essential Classics, Vol. 1014: The El Dorados
Soulder Man (Soldier Man) (with Tommy McCook)
Gay Jamaica Independence Time (Expanded Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e545d97049d5b3e3c1f166ea2f8795ccf0091cf2887bc266abfdc49df1e5eda. 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/GB5KW1900989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c857f4073be83f9b39f6f03fa79baa8781234a06093328d1691104629c1520. 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/USUYG1051690.
The Unavailable 16 & The Original Nitty Gritty
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1617a0f3fe33601cd7c4927e33ad6fcbf002a8843c5ca321444100766d4eef. 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/USVJ10401916.