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 0xac55850b702e2e23da9a3aadb7b143ea3acb61ec1e2bfeb31977d670e6e395ab. 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/71749848-bd8b-4ceb-b5a6-58d6f03cf0e2.json and https://artists.proofprofile.net/proofs/artist/71749848-bd8b-4ceb-b5a6-58d6f03cf0e2.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 0xfcb34868314d3e8d6668d63012c4b0936a0b6658cbcf53ea7066b1ccb06ae6ba. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USUR10001353.
Trans DF Express (feat. Cee-Lo, Outkast, Big Gipp & Backbone) - Club Mix
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 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.
Jazzy Hoe's Part 2 (feat. Kurupt, Too $hort, Field Mob, Backbone & Eddie Cain)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84d47b5b61ed7f17544f7f700e797e38562b0fa7ea9db33aebcdd8a2637df13. 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/USSM10109187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898d59293d75fb271de854bca6f763c9fd9d29bdf2fd2e0966dff2fd213e4c6a. 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/USAR10200714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ec0ebcf564a522d17d12ed487aba8180670ccff350fb490ede3ef860173335. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USAR10300726.
Hot Heat (feat. Bone Crusher & Backbone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde81f28115ceb963e794db958c6581b8bd6e82b5bf67a869e96161b960716ff0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USLF29900216.
The Best Of YoungBloodZ - Still Grippin' Tha Grain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898d59293d75fb271de854bca6f763c9fd9d29bdf2fd2e0966dff2fd213e4c6a. 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/USAR10200714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2765b6c2d70feebec7a895bb44cf191198732b39237d534e865af1b0e428a48f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLF20000326.
Presenting Dungeon Family (feat. Backbone & Killer Mike)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfe716fa133a73e788a39de862a7583bb3cf537728ebb70ab0597991105c92b. 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/USAR10100672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe38ace1f48ffb7b492849c9c1a2bc291210e5f6f92a0a49f0116a3975061a0. 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/USAR10100670.
Emergency (feat. Big Gipp, Mello & Backbone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecc582d8b33f73ea72d0ba206cc34aab2d2c5375b2ce6ec64c8426b345bb309. 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/USAR10100676.
6 Minutes (Dungeon Family It's On) (feat. Big Boi, Witchdoctor, Goodie Mob, Backbone, Cool Breeze & Big Rube)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff005d8bf67ffbb7511b09d857017da9be6940119cb0738aaf3329253fcad764. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USAR10100678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1db5f125a08d53e885ed1e77270988f72a561057881ae0c885108852e376b7c. 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/USUYG1139329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c8d18f0334ad2a4468a808c2bb5a34fab0418fec4b95827133581f553771c6. 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/QZAKB2002045.
U Know Dat We On It (feat. Slimm Calhoun, K.B. & Backbone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5c438128d008d8ff7eb78779d76a8c57900815ffa15564a8175f6836d26a03. 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/USUYG1194499.
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 0xfcb34868314d3e8d6668d63012c4b0936a0b6658cbcf53ea7066b1ccb06ae6ba. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USUR10001353.