Jamal Rocker (born June 14, 1975), known professionally as Mac Mall, is an American rapper from the San Francisco Bay Area who became known in the mid-late 1990s. Mac Mall signed with the record labe
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 0x76b8c6514d49248f2acc59c33aa46583810dbd15eaf7bd9da5a442160929bb13. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6b53976-7fd3-47f3-bdf9-cba96d2e700f.json and https://artists.proofprofile.net/proofs/artist/c6b53976-7fd3-47f3-bdf9-cba96d2e700f.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 0xc1984c5fa49d199517bc3b4b934f9d628265100c6438df886b1e690a2b93ec12. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USBA70500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddff5036c24912c4eb0d0a55ad3379537a3fd965ee63239318af816640acddb1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USBA70500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5179efdd4c0bbfeac8e5b7b22bc5bbfd3b1cc38d43f2c8bb8c7b2bc853f5e30. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:41:39Z), 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/USBA70500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c8952499eb2eb45bc4a4af514d943d84a5bbdcb6881919913b6d1a167addb7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USBA70500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a7164cac720e121c72adddba6ca0c126fd4c82ee23044330dfa62974e74fd9. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:28:24Z), 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/USBA70500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c38c95b52a27d8a00b2d764196a8d3334f5d25fd28b37a2e008a75678ee26c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:08:52Z), 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/USBA70500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617a99656e130b065383ec655371587e87f34a383b149c0bbe444d6df317eea9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USBA70500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ee4f50844c154720bcaf454ce884d015d3d81d545abb6528bb436d3f357073. 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/USBA70500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fa2f97b5022f415a410969615ad39e236e500f91c5b71996eff595d2ef952b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:48:44Z), 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/USBA70500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d48c3f28ad632331c9f6918a1847fb9b1a7291a02c8d2256236782c7e481b57. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USBA70500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef10435436a0c9ba0c4e8511ec66c197a2532225b0a2a32830be86aeaebb2a8. 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/USBA70500015.
Thizziana Stoned And The Temple Of Shrooms
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776ac639c8f0ef61459a85628f144e36010886f3148d122c4771af23136caeb2. 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/USA2P0717978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38347f290e7e9b8a4229bf18142371ac0ad059d8e25d1db8d52f08ac3c833b90. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USA2P0717981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deca25e63a09492a300939ba34c13bc7d5c3d15e13a3fa84e36a647de3104c7. 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/USBAE1303399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fca57b4477e4d79ed665f178b6d822bd7a96492876cb8058943dc434911f361. 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/USBAE1303403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bb55bf923021f59f5ddc6e13632be08652b0c5d337c21bd0b027e90b7f0a05. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USBAE1303404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed7959a85d24f99895d9b06c7682a6b81624479bf2c95f5abea18e45c7c0451. 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/USBAE1303405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa6786646d81f75d39ff0c99e558cffa40b9e0d62e26953111ebbae7bdce5a5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USBAE1303408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cf97a74be3ff1834fa28363f74b724d1ccd698ef4266394b2995dc02c337c7. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/USBAE1303400.
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 0x947dc6d585fe5657e1c0b5ee0f7d6de9d325ac7950176f65f801eb807f870ab6. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USBAE1303401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a922fa74b727fdbd869935102e7842c5e6744fe39e3415ab72485a690d34cea. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USBAE1303402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f975121ec4e334f7f945ff595c6a8e996251e59cbcbe7e016088cb57e26a547. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USBAE1303406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e2e88b9ffa7a259cf0ba08e75a683cbd2668638e19bce588872481475ef456. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USBAE1303412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bba6cddae8cab130ba665ca84cfb94bb36910fcad23149fa9e7c56e023f5d39. 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/USBAE1303479.
Thizziana Stoned and the Temple of Shrooms
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bda9c8c0dadb25b46356aa18b6a1368b9e2e310d6694a50ecb23fc3dcedf35e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:49:32Z), 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/USBAE1303384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e75db4142a11ad80b8f0cd8e7026d3d6cdb5ee8173922b46df692c2352b23e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:51:24Z), 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/USBAE1303385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8683c92fe3e273871617165021807597938953690e15d2a897db6934842ecbaf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USBAE1303393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff822954a271f2a033a23d6abd11515ec479c80dafcad9e8c67198f2d406bf6e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:24:30Z), 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/USBAE1303396.
Put It In The Air (feat. Mac Mall & San Quinn)
The Block Brochure: Welcome To The Soil (Parts 4, 5 & 6)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39989dbfe15eb1fbdb27b227adb9a4b3ed0adf22d68a60e7907012e9ce2774c1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US4KV1300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca36b07799f8d7958e48e7fe59ca9ebbd7ed8afe2ea606bd32c864807cec9d4b. 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/USUYG1050993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e07a92b725c08f18b75e11b2a49bfe122c3e5b2bf91b9461713d375ba4b4bd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDYP1100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb7c262d5c242a1c39f1574172e49d2553161091eca9eba569c13b1ed2e58d2. 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/USDYP1100103.
Bay Area Playas 2: Raining Ice in the Bay
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adef6a9fd10023526d1fc0c45eae45eec8eaf8139b85515ac32026575995ae7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USBAE1306080.
E-40 Presents: The Bay Bridges Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edacf1e76beba997b21900826715b345340ffba844962ca344e22a1c36530ff. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USQY51351887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fdbd9b32014b4da4c9b996b4186f0ed496bfbdc1ed1cfa484b627b146ada96. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QMDA61418102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c571d0e6b1cfe8df46d7324f1228b709684a3a2aeedec8ef9b5244a5b6725c. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USDYP1100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcada23b50c23c1e263355f9e6421282fdda313fe83fc0fd3034cd2aeaeeac9f0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USBAE0801156.