Outkast (sometimes written as OutKast) were an American hip-hop duo formed in Atlanta, Georgia, in 1992, consisting of Big Boi (Antwan Patton) and André 3000 (André Benjamin, formerly known as Dré). W
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 0x106b82968f76368778f00305408ab71894c2cb5df54667a0b1847fb6bf0b7a53. 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/02191494-0e07-4311-90b4-764843dfcc15.json and https://artists.proofprofile.net/proofs/artist/02191494-0e07-4311-90b4-764843dfcc15.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 0xd4e6ed8c464326bdf7667d38d5ec7cff1e2c9434d06b5c8e241fe46ca70f992e. 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/USAR10300924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3b09ddc7f51cd0b28b14c325f01c04491afdfcea7cc7808326c2104dbc0290. 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/USLF29800320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574afb81580d8029da119bb957262a1307fb06b355ef7270619a4299ffc0ff23. 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/USLF20000392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46601155315ad73b37ab846eb35183207e9ae9d09b576a77cad774aca8df4b5f. 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/USAR10300967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a7482de62a6d6dffe68823c4887af5d9704a880aab7909de6c8cdbf3d47a07. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLF20000461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11026bf119a29ddbe68150442fbc833cca7d2da9485076908dd382ab1ef67b2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLF20000438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e8f9afe6670d1a2e887c23fca4ec4d14956a74dbab4430d473ca873f34f012. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLF20000490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c99b2728bd3bd91286bf9c177777f70653af4dfff6f0d7a9f6abfc6d6a5e3e. 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/USLF20000357.
Snappin' & Trappin' (feat. Killer Mike & J-Sweet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224cf48a62f6266ebb64aaa8a5df380bcfc7da0a7e113e977978d9aed31e080e. 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/USLF20000451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbaa1eedc0d7236c11740ba05cdbadd1960726df5c9e88ce59240f23f693e011. 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/USLF20000491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb923d10b70afeb3041124134d82ef9095813b4d909686803c154de41ff26884e. 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/USLF20000445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b85a967f23d7e38f6326cea7dcbfa0533c66e237bd9684913c056ff93221270. 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/USLF20000492.
I'll Call B4 I Cum (feat. Gangsta Boo & Eco)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad85b8de3598870b171f56bac761c6686a4860f650c77d4832a24407664d6d84. 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/USLF20000440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb624128ca9de60b2ea22845aee41167486e7ea2821992a0487a975216e01bcf. 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/USLF20000442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbaceddb4fc3b3b3484852e67a6a0282dc9ee625386a7c88203436dde9ebb49a. 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/USLF20000449.
We Luv Deez Hoez (feat. Backbone & Big Gipp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0dee6d646630fb456d855b510032f198cffbb583ed94e9625b2101e31a9a13. 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/USLF20000447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010f47729e8195e370503f917ba997ccba267217563270ec95da5578bff80841. 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/USLF20000443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa53a8b015a2d9948f5a11fa3c869366e0a4817790b528d974e561d3d97ddaa1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLF20000453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83089f0e18fb32a3dc952885584735b50fd4bfba5291ebba93a96578f088ce89. 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/USLF20000436.
Gangsta Sh*t (feat. Slimm Calhoun, C-Bone & T-Mo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd944aedf04db4c84b84dfec258516384dddef88a0da503752c85eedbbd4f8b7e. 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/USLF20000431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1928ca6e08583f81eb49b1e97f1c7f4b79ab11a78b0213cc700c54e3883c07d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLF20000480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39d55351486b7da24f133400bbe405c1cc138687f7cefa34720f93b01bda10f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLF20000455.
Stankonia (Stanklove) (feat. Big Rube & Sleepy Brown)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eb46684c023213ff73a9b2ad06e999d95d1280aaa1ed3cbd6593ade487ffb8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLF20000459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bc4218e2eb4374fa8796e69c19706cf31143bf1893d201fe6c88e8930eabab. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USLF20000494.
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 0xfb436fdff7a73ad436b8e983043d5e8eefdb773b7665ffb02ea9ed4507800c0c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USLF20000496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb5baac068a664e4ca04717ba56cd37805672ccf6db30b4af00d395d5be58c3. 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/USDJ29900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09fee5d16301093339774dcf3ba03ab31a5ff87e00c3ceb8a17797aecd685c5. 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/USLF20000517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36179fd215befee920d482d9d9388d369cd93e651201e60adba67916a4b76f4d. 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/USAR10301095.
Hip Hop 100 Hits - Urban rap & R n B anthems inc. Jay Z, A$ap Rocky, Wu-Tang Clan & Nas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b07d4cac7f319e9b3f87fdb4b1318cce892af9b249adc3eacf752477cfc89d5. 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/USAR10301000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb16f829a8e22e26023249cf0ef328ac9d7710e8d95f2c3f15681ff2ff0e759. 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/USLF20700093.
Trans DF Express (feat. Cee-Lo, Outkast, Big Gipp & Backbone) - Club Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe38ace1f48ffb7b492849c9c1a2bc291210e5f6f92a0a49f0116a3975061a0. 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/USAR10100670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa143fefb7464038aece7f852df8a549949d2263d4c058a0512876d3c103296. 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/USLF20000410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e6ed8c464326bdf7667d38d5ec7cff1e2c9434d06b5c8e241fe46ca70f992e. 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/USAR10300924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb16f829a8e22e26023249cf0ef328ac9d7710e8d95f2c3f15681ff2ff0e759. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USLF20700093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e6ed8c464326bdf7667d38d5ec7cff1e2c9434d06b5c8e241fe46ca70f992e. 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/USAR10300924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1e81307982c3d6f8cee49837b681ca38626cdcbfceed6a9193882fb0104bfa. 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/USLF20400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39f97318479dbeebe7c3fcf76d615eaf716a06a405a438f1a921396f00ee758. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA370947391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038eec62409c65f5d64bfffe5e19d6826b9964ab7a479239a2311815734d8a60. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USJI19910849.