Mark Potsic, better known by his stage name DJ Nu-Mark (born June 10, 1971), is an American hip-hop producer and DJ. He is a member of Jurassic 5, as well as the owner of Hot Plate Records. He has col
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 0x9a6028ba74589f794b4186610b77ca9b34ecf9419189cd03f3440b0d01d79474. 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/89ee8804-391f-4142-921e-43d5c8d365b9.json and https://artists.proofprofile.net/proofs/artist/89ee8804-391f-4142-921e-43d5c8d365b9.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 0x94248d0152787a995e887bc2da462b5d74849df85161182c474fb0589d1c6797. 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/GBWUL2497383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a65de1b3b7655e6dca9e5fedfcea74e718fda68a76953703e3d29a0478ab597. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/TCAEC1954774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1490f9236c15235a5edb1d5297bca5dded300e55121ca7ad49752681cf9e9c5e. 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/TCAEC1954778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216d48ea6c9624d1e242ad4cd332903d2d1404c003d9c3ffcf38b68d8a116515. 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/USFZH1200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffd53ecda3fd101961f6c1e752f2dbac7633a5349ced441a4153c077e676e0d. 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/USFZH1200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7be8c5e6d9b1a95c0ad0e9dd9621feff7a923a093f917545cbda8835b26f464. 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/USFZH1200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff1e3db86f511f8d3d6d8e230daea5893bef07b815d5b94411c23ea164c494b. 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/USFZH1200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a3d59e5013e188fd4ce041454332192242e6848c33758a2ab8ee1f96a01b85. 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/USFZH1200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34d9e893c71d004e940a9828444fe52d03d235b59ea5bf9c4e116326195c4c5. 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/USFZH1200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91543ac72ef9a0ec3bf25de414041f3184890b28b4d552bac80e02884ccd345. 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/USFZH1200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14eee7d10b8f552135c9dda4fb81c09429dce63a8436ea1e0b3892a6110a94d. 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/USFZH1200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239af6397b7c995cdeb2b76f64b43e1a4b4a2f4a902a84251a3744362eb2887e. 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/USFZH1200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cbaf1149610c8d8c3e3ad09074a37f3c3d507d60a9595d3b32e0e72f344491. 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/USFZH1200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f4bab7f1061a2789d780187f7d1c3ecb15f4670fb095cf6fe996bd1c0ba429. 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/USFZH1200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbfeb94ed1d9ea27717f717f209fbf3464692f38431fe3cd1eb5feaed5c89fe. 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/USFZH1200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616a8c787253978ce0fda00b21b594f77c34c11c66da15628e6d161fbbbfc98d. 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/USFZH1200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f92ed9affbdcda9a4fe4a837f444caa050021cb8a92ff13e21bb545b05b523b. 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/US6680915702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91acc51b4083fed716abaf5149c7479cc6f2a32fb76e11e736da50279ed2de1f. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/GBWUL2106299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab0526d8feb6ad64118d0b153f4bbbf519d1649f3d9ea335f5e69fc2e325cf3. 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/GBWUL2106302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9fb7ac24ffc8fd3e7edd9bbd03c926d6abc2393f7e15c3d972fa22a04256c8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBWUL2106314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a0b963d8ef05d7e448211da7e208d55807f2e5213f9be2a46c665211cd72d6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBWUL2106326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9697b51b027ff3cc9dcddf54a431804e105a65e35ab2939a3805c4885d44eaf2. 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/GBWUL2106418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e41d20f4b4f765a67ee00cf4a76bb98cdefcb9666fa5b32cca79334bc64eb4. 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/USSM10606948.
Chef Aid: The South Park Album (Extreme Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e41d20f4b4f765a67ee00cf4a76bb98cdefcb9666fa5b32cca79334bc64eb4. 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/USSM10606948.