The Cataracs are an American hip hop record production project and duo formed in Berkeley, California, consisting of David "Campa" Benjamin Singer-Vine (born March 9, 1988) and Niles "Cyrano" Hollowe
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 0xc0be447b525b38a987d5434bc0775206536a49d51b06f83c344e85e8a97e8ec7. 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/a0f2c7b5-4341-450d-8b09-a5ebc4394d8d.json and https://artists.proofprofile.net/proofs/artist/a0f2c7b5-4341-450d-8b09-a5ebc4394d8d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Marshawn Lynch Featuring The Jacka & Mistah F.A.B.
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 0x6d628fcf666572643d81530495454bff5b0d99d20fdc68d7aa77fd2b9e8385f5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:48:15Z), 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/USTC30780484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1c3f5c369da57533224e8422af8276cccc68b18911e339af42139c4797cee9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:00:47Z), 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/USTC50890977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f15dff8342ffa46191ef5e5adccce545b9283243f51d68c334ea979d7a63654. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USUM70989323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357fd3700d11a25112a4eb28b2b9aaed7d1e061a71512187f567531104347e34. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USUM71111062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391ad4b302a5cff981ef01ac617f08d3ac07ef44c556c48dd8f42d4ec7f32d64. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USUM71216098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f046c6094ed42e8512ad67b98178bb3d29e8cbd37c96ee96c32e500cb76ed52. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USUM71202873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5b466a2fc5b8721d689dccf3d5c329504560b09bb7862c7261caf624ebf0aa. 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/USUM71207255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267f4564ed15e115554054b04d3daea9738b17d65556c8d9e905e0d97ec0e0a4. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/USUM71207256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304c9fcf45ce8a90fcd25c8c081acdc5a113f0132c6954918481243ae2c3d41f. 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/USUM71207257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67bb59422478751322dc31a08ecd18081e526b3f46bce71146991fff546b1a4. 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/USUM71207259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de24515efde2c7aea09503ba3935bec8843838781b8c3ddc936e2382babb750. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USUM71216083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacca411fd4432492d4b7d8f628da934686bbee3cc29bf2705580c60419a866c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZS632339846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00745acff6558674fe02dfafb7fe77a8c64e710c0342b4b4819c572c0240471c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USUM71008138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2e585be1b36bf3cf7f495aad636cfe951dd8423820d1262c2b0cbc436a758d. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USWB11100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00745acff6558674fe02dfafb7fe77a8c64e710c0342b4b4819c572c0240471c. 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/USUM71008138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00745acff6558674fe02dfafb7fe77a8c64e710c0342b4b4819c572c0240471c. 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/USUM71008138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2e585be1b36bf3cf7f495aad636cfe951dd8423820d1262c2b0cbc436a758d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USWB11100018.
Rich Girl Remix (feat. The Cataracs & Young and Restless)
Slappin' In The Trunk Presents: Syrup and Kush
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799edea72bb0674e15367c6e6641078380b512456ab64c5e6ee52459fc596f6e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USBAE1100718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00745acff6558674fe02dfafb7fe77a8c64e710c0342b4b4819c572c0240471c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71008138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ca6e956afe64de12cd69d7a0a8d57f579d96968ae55fd30cffcd9b6e3deb9c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USUM71028032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaed727b14a359bd68d0ce842201651a799fec58a78eb1b20c94adf172a3a8b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USUM71024496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00745acff6558674fe02dfafb7fe77a8c64e710c0342b4b4819c572c0240471c. 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/USUM71008138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00745acff6558674fe02dfafb7fe77a8c64e710c0342b4b4819c572c0240471c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USUM71008138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00745acff6558674fe02dfafb7fe77a8c64e710c0342b4b4819c572c0240471c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USUM71008138.