2nd II None is a hip hop duo from Compton, California, consisting of cousins KK ( L. McDonald) and Tha Dee a.k.a Gangsta D (Deon Barnett). Closely associated with producer-rapper DJ Quik, the pair rel
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 0x83894f5ddbc7cd0fb1d3db3af1f31fd851a468dce1b19c3f1c9a5ba1fba24dfa. 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/f37afa96-2974-480a-918d-96fcb321fab1.json and https://artists.proofprofile.net/proofs/artist/f37afa96-2974-480a-918d-96fcb321fab1.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 0x3edf0b4dae4e5c6f1fc680fac76c116a7639bb3d0318adb417783983f1358baf. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/USAR19900822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4678de54cfc9e4a8e6ad18fb0f3928945090df75256bd652737cfbe169181f08. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USAR19900831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d5acb72fa4c4fe0a49151f4359be413f318c5bde080caf4398306ee9c019aa. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USAR19900823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc88c3b62fee60f416d42ca1fee78a902507f8fa31b7aec437856d0b3c48c454. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USAR19900830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967269d88a5f3d49ff5675223e58c6f3775085b4370eea41a88e8f96ab958cf1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USRC12001287.
Up 'N Da Club (feat. AMG & DJ Quik) - Radio Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7955927f825b9768f6e818033ceb66c197c51f1a8da531c5831c068f68add834. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USAR19901624.
Up 'N Da Club (feat. AMG & DJ Quik) - Club Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03551a1ab8a9b17ac525723c9171c7a0bcb7b54c94212d62796626c9c32aae5e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USAR19901626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8eae9c504c1d23716959dfee1cbcf456afdb4cea6d600ebfcf0a79d81f80fb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USAR10000524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a4cf2fcff29b9aea2cf62ec70765f317cf71a5a14224de3cc92d7241e47f08. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USAR19900279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8682b4876d6245561a6dd659b0b39969ce80c44607b04bc7d0a0b12d907d0be8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USAR19900281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2750f77966704fcc386d0e27fd787ca60066e033390b8a74c552e65acf1c9c4f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USAR19900284.
Got A Nu Woman (feat. AMG, Hi-C, DJ Quik & Playa Hamm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8842592b23d04b6599674eae01a7eb72583e636934d220f8f8eda3fd68e7b04. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USAR19900289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d54c56e46a6b0b1a43c0ec5258e85cd4b31c709281456a44b67291229fa52b2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QMRSZ1802237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3ec885ddf763412f24e6a28275918cfddab77368f2aa2845fd75ad4c154fa6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZTLC2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cc1cfb777666082fcd9230e6e70e8fef892ede37616218e5ecf91b6c207ed4. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZTLC2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dde8c37fcde39835a2ac6bd8aee000ea46628001b562e116c26e1fa41bd39b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USAR19900820.
Giant Single: Profile Records Rap Anthology
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078100e3832e02cc5f39d46eb264ef7aa202951fdd44263b88686e75937e9fd4. 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/USAR19900818.