The Washboard Rhythm Kings, also known as the Washboard Rhythm Boys (1932), Georgia Washboard Stompers (1934-1935), Alabama Washboard Stompers (1930-1932), Washboard Rhythm Band (1932-1933), and Chica
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 0x9b68ec5c65243b6d43426765070ba59db23a9ab07cc3123c2cda45d2d3de71fa. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/197338be-afb9-48e2-99bc-18cb373761ca.json and https://artists.proofprofile.net/proofs/artist/197338be-afb9-48e2-99bc-18cb373761ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Washboard Rhythm Kings Collection Vol. 1 - 1931
The Washboard Rhythm Kings Collection Vol. 2 - 1932
The Washboard Rhythm Kings Vol. 3 - 1932-1933
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 0xf02a32c935e5c434fd1f3883ffa741f7506bc624e91da928c6aa5aa50f915258. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DKEFC0815314.
The Washboard Rhythm Kings Vol. 4 - 1933
The Washboard Rhythm Kings Collection Vol. 5 - 1930-1931
Jazz Foundations, Vol. 74 (The Washboard Rhythm Kings)
Washboard Rhythm Bands 1931-1933, Vol. 2
The Very Best of the Washboard Rhythm Kings: Tiger Rag
7 merveilles de la musique: The Washboard Rhythm Kings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd20741d28049eed74d4aca277712a45745c41d92988d3709f55dc42c6fd4dd. 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/GBSMU8817287.