Marcel Theo Hall (April 8, 1964 – July 16, 2021), known professionally as Biz Markie, was an American rapper, singer, songwriter, DJ, and record producer who gained prominence during hip hop's golden
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 0x15002343f1ba6c4a751457eabf6cb3343d75093bf46ed7dc4f84077583c81cd0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a02154e-14a0-4642-8247-2b516f185fae.json and https://artists.proofprofile.net/proofs/artist/7a02154e-14a0-4642-8247-2b516f185fae.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 0xf02b132e8d1bcba25e7c53a3ddf60c930a303e8506a2d1ebfbab50ece24ac594. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USRH10903107.
Biz's Baddest Beats: The Best of Biz Markie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7932c299b762e04b358ba25009e1aa4a239ef1578381967be621a724208e9c8a. 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/USRH10902667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc312dfe234ee70bbc2ddaba981f2ebf41326a1e72fc6476126b81bfc0cce0d1c. 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/USRH10902669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2105b065f51325697f026fded08152fcc8ff9f886ffcdb28710540d10b6440. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USRH10902671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b25998e5ab11b0caf871b47e06bd35836f94053bff759547270db363dd8968. 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/USRH10902678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20477de2ccfc33add923aed1f771b41e7f7d73730a9390b412e32ba2b38aea9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USRH10902680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee06ef5de928cad7034d63b68cc9c78c2efd56156bba470508032744e8fc56f0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:26:26Z), 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/USRH10902681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e359887700156ab58daa53517f1a6a320b4d67f79fe66654eb5521c3d2b9413. 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/DEQ020300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4854b453ce980cdf94e1ea605c234ff1d82d6a918f93fe04eb04751e5c8ba8cf. 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/DEQ020300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272b0faa06593d298d77be0d471fd9b44faa3344a707bf8ec048ca910e521e1a. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:41:42Z), 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/DEQ020300046.
Just a Friend (Re-Recorded / Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20477de2ccfc33add923aed1f771b41e7f7d73730a9390b412e32ba2b38aea9. 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/USRH10902680.
Just a Friend (Billboard Hot 100 - No 9)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d9efa2e0429fc433702b4fbdc21f7dceda3dfc0daf94356960eb9d63a4ec0b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USRH10902670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85394789cbadcb7828e18217e10d0be575796b49502c8bf6af11c081561e8bf4. 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/USRH10902676.
The Biz Grasshopper Experiment - Remastered 2009
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685d4be39d90cdc267abdb6e47141203d54b1d5516743a3b627e36ef1c91dc33. 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/USCA20903800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4e6a336db047808d1061519bcab6b95998350fca0fa33fdf3d170e2c5ec4bf. 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/USCA20901530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e7c18fd375848b9adc153aa273b275a4a5f51b5b6f7829ac09577aea72bf3f. 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/USCA29400080.
Check Your Head (Deluxe Edition/Remastered/2009)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80ee035ec64b3330d51e9c88e5515fe56e1cdc755623a405239fe03b1b00b8f. 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/USCA20900108.
In the Hands of the Gods (feat. Biz Markie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65de52fa978f6ad8ecb7f239efd4336257846e9dc44804e21e2ea6ecfa8c3283. 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/GBAHS0004200.
101 '80s Hits - New Wave, Old School Hip Hop, Hair Metal, Pop & Rock
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe726c5ea62f19c76d42277cba579be05e0246e9886cce27eb140c2d383d83c17. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USA371121937.
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 0x3a578ae48bce19d00906f730b9d05f97639f7b50b2faa7fc5546791694387d02. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/USA371278700.
100 '80s Classics (Re-Recorded / Remastered Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786a278c261a62bf50435e95be52e455b2161a3c601912f65e522dc8d735c467. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/USA370961710.