Mamie Smith ( Robinson; May 26, 1891 – August or September 16, 1946) was an American singer. As a vaudeville singer, she performed in multiple styles, including jazz and blues. In 1920, she entered bl
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 0xb0e9f100a9dcf0d5829fc640e5bc3f9e4e368a2caa4cd1415dc6783b027aaa5c. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8dc942d3-1c63-4ffc-a9f9-d3d225796626.json and https://artists.proofprofile.net/proofs/artist/8dc942d3-1c63-4ffc-a9f9-d3d225796626.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 0xfc213781a7699156cb0a86fc363bbbbdd28cc0a17a4e5c22c9d40016c5dd454a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEXO52489379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6c10bf090a8fe07cce3b83bccf4421b1ede5460158fd6f1dce3e2153bfb491. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:42:28Z), 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/DEXO52489466.
I'm Free, Single, Disengaged, Looking for Someone to Love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f49b54bc234bc47e3244e8da0ef1620cdf7249172c4ed1ce9ef03d57643ce4. 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/USSM10309151.
Female Crazy Blues (Classic Mood Experience)
Over the Top Blues Masterpieces (Remastered)
Can't Be Satisfied - The 1920 Recordings (Remastered)
Let Me Tell You - The 1921 Recordings (Remastered)
Essential Classics, Vol. 805: Mamie Smith