Liquid Audio Inc was a US software company based in Redwood City, California. Formed in 1996, Liquid Audio developed a major standard, multiple software clients, and a client/server media distributio
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 0x77c0426084dbf97827a8657ba3fa16882ed20d554de8b4f9e12d4dd04bf251d9. 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/31a97d9a-4b09-4c44-9ac0-dccd0c4eab34.json and https://artists.proofprofile.net/proofs/artist/31a97d9a-4b09-4c44-9ac0-dccd0c4eab34.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ether - Originally Performed By Nas / Karaoke Instrumental
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 0x1702c6f1dd5113a6ffe77db814aebb06ad3087afd56e273ee55c13641da06546. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USJCH1200549.
Mathematics - Originally Performed By Mos Def / Karaoke Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff620f563c00911a05f217cf7064ff54fb3975ab8ef00b40d16c9040b326322. 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/USJCH1200555.
My Block - Originally Performed By Scarface / Karaoke Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69462a06dd3be8dc90ec93c9ae987c0329d8297e6789a10e3cd1b9581a32c26e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJCH1200557.
Rebirth of Slick - Originally Performed By The Digable Planets / Karaoke Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f610a93949e66d3722a6a118d3e5667fd96a6996a3edaf0e6fd05101bbca06. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USJCH1200558.
Smells Like Teen Spirit (As Made Famous By Nirvana Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75fc12d5b227dc5d1a134fb8bd452e81b4c7b202d6520e8cba38bec3ed07339. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USJCH1200575.
Hey Lover (As Made Famous By LL Cool J Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290c926e3a1ba8c603c72f994fb3aa2c28a033f9f277a01c9fee007e3659beb5. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USJCH1200619.
Nuthin But A 'G' Thang (As Made Famous By Dr.Dre Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca8055e19d2f72faeaab9bcf2db2aa909c20b7d5c480cc8bf4ba63b124a10cf. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USJCH1200621.
Straight Up Menace (As Made Famous By MC Eiht Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04578c9868c9fe15300a37cdb00a1c31765cbadc2541c3268c1f0bce6b912386. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USJCH1200623.
Summertime (As Made Famous By Will Smith Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1518ed09222009ae552ecbeda6cd81e7c61b9fa17f4378d234c98d524966de. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USJCH1200625.
Tonight (As Made Famous By DJ Quik Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611ad52abeca0802b49d5d798cc34f8ecbeee59deb6008a3492042159dc725f2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USJCH1200628.
1,2,3,4 (Originally Performed By Method Man)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcd628e674b9cc5e50abf2ac54b9f7001ef0a7c402ca4cd823eb9c74534156c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJCH1200679.
Day n Nite (Originally Performed By Kid Cudi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d568a29fab625564537e955077c46f7983d89c467299effcdfea07ecc8f5013. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/USJCH1200683.
Paid In Full (Originally Performed By Eric B & Rakim)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443312c163961750c2823c19e13572aca119580756b00b7723321ba4fa169ef0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USJCH1200688.
Paparazzi (Originally Performed By Xzibit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc510b2f43959d7cf7be936b2fb40595e69467f7b490765e33d32e1689429c6b5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJCH1200689.
Go To Sleep (As Made Famous By Eminem Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ea23d12c73c3905f7725d0eb03a305af96c90e8401e4aedc2462e21a44c7ac. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USJCH1200671.
Nobody's Perfect (As Made Famous By J. Cole Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273e6dfcd3b015a4b6b347c375c178ff06ec33ad8e186ba859e58e029c24ac8f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USJCH1200675.
Underground Kings (As Made Famous By Drake Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a932ddd11594fc2117184cc882af9ec93412d2e6b59e4a6a2ae5c70c60eb34c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USJCH1200678.
Danger (As Made Famous By Mystikal Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa36b03d300aaeb16dc8eaf30adf1ff2b80dc0abb147cab3dd29717f4a6ade1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USJCH1200706.
International Players Anthem (As Made Famous By UGK Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2ec484ef0087dad2838aa3af44e0cbee6ffd5b61089d272ec4f682db63dfd6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USJCH1200708.
So Fresh So Clean (As Made Famous By Outkast Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6d06b04934b91da907af503256b666a4908de1758c9734508506c6c768d7b1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USJCH1200712.
Jump Around (As Made Famous By House Of Pain Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264a26fe5fa209de8fb988617d57138aae2722bee3d961fd8a405314ed116def. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USJCH1200719.
Renee (As Made Famous By Lost Boyz Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bda3c9da5d241ad4c783de3347bb0bb14636d2a082d47b1ea3a70da4e7ae1e3. 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/USJCH1200721.
Lights Electric - Instrumental Covers, Vol. 1
Champion (As Made Famous By Kanye West Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32f05572bb72de4c2d37115d125918767fa58dd007463e4138af1df4c64bdd9. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USJCH1200777.
Window shopper (As Made Famous By 50 Cent Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69821d92c09afbc60502d635a928bb80bf9e15dbedd5ab05ff0e8696e38fe83d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USJCH1200784.
Dark Fantasy (As Made Famous By Kanye West Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632628aafc570bbb827c08209766760c7aa9bbf733eae9b3318784734599f23c. 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/USJCH1200795.
Money To Blow (As Made Famous By Drake Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8b4e1a3d0f370e06b452972f70bb39039494095f137e4b95d17e3d275ec401. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USJCH1200800.
Otis (As Made Famous By Jay-Z & Kanye West Instrumental Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3d3b559a41f0ef7347cc58c3a2cae80919b6325a45b1319a8171e1826ba622. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USJCH1200771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8164e3e229c00062afd511c68987054f5e8ca0cd40bd82f76c91d2473212574d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USJCH1201462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293b97b045682f1ad0feaa4088d7f5f965e6cd7c77d4cfefe19ac6fcf170d30a. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/USJCH1201465.