The Harlem Hamfats was a Chicago jazz band formed in 1936. Initially, they mainly provided backup music for jazz and blues singers, such as Johnny Temple, Rosetta Howard, and Frankie Jaxon, for Decca
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 0x60e9f4636c3124643a94d85496aefa655488f1da0e2005d4003a14e841c4e4c4. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb88558b-007c-45c0-a5d9-cbda169ecae5.json and https://artists.proofprofile.net/proofs/artist/cb88558b-007c-45c0-a5d9-cbda169ecae5.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 0x1f46ea5356b73be2f1958a743320bcf79d7c28dcfce6f6e1f167226d06bbd465. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GBENE0300413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205c4e77683a5ffb4f13897a7109ff5b83d5c7d0183f6e856a0db186128f5d03. 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/GBENE0300374.
Hamfat Swing 1936-1938 (Blues Collection)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f4153153b1df316c2a4f56f8554588fc20052a6c393f584d6657e01b374fa3. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/USA370679487.
Lets Get Drunk and Truck (Songs About Drink, Drugs, Sex and Troubles 1936 - 1939)
When The Sun Goes Down In Harlem (Extra Medium Remix)
Whiskey Blues: The Raw Harlem Hamfats Sound
Back To The Crossroads: The Roots Of Robert Johnson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6b44d51d807bbc8bb43ed6b0e46f68c436a08c0140adda55aa1b8d4b73967f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/US7SF1352970.