Talib Kweli Greene (; born October 3, 1975) is an American rapper. He is one half of the hip-hop duo Black Star, which he formed in 1997 with fellow Brooklyn rapper Mos Def. Their 1998 single, "Defini
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 0x1dbc8d3429295e519d0ad076ecea31849089da52b0eab5f460b9e6424da53173. 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/0629a55a-21e4-4582-920a-e2b7b73f5179.json and https://artists.proofprofile.net/proofs/artist/0629a55a-21e4-4582-920a-e2b7b73f5179.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 0xc350a87bdbc1cabc9f814ef5424d9fbf838497ef125029a52f7e377af8c4417d. 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/QMJE32400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ec5d1d348ac176b065d00173cc895eb667cf974455f3aa7a580287d4b5ba2e. 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/QMJE32400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c936b4aaa4dbc7550573b9c9cf4378ae2d1811ca4a9debb8144893b86b7d0e0. 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/QMJE32400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccba6c59c8859c85d9fd8a5a551b3bd4bfc29c77085552eb365c80c1c694655. 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/QMJE32400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb67f127c761ce59ac09e4574af208db3c4c098184589c43778ca4f3ca99635a. 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/QMJE32400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d32a0a2103fd96f258d8866d6db0d6312c8919139b4194228c19dce7842962. 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/QMJE32400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc120e3eedee44965d8add4692960d7e116c7f51a574166ff9047f42702ac6535. 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/QMJE32400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342bec9fc4163449a43694a5a6be8955b43dea1a9b54f20c94ee0dd4446f9c80. 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/QMJE32400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1f2793f7b0f744649388e3eceb556295ba6e1336af64e8e890d0abb2461112. 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/QMJE32400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4584994be3ad932bcbefcd782918d81b162b6bb7c87229ba73d3ac715d5745. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QMJE32400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f825fadc3721d5acb85f72945625e9934c347e4197123ffe54cfba554f414f. 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/QMJE32400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb564c767b84cbb667b7c534d28aa0e2c4dcd7f38e4862fbb8414400c9fc7fe. 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/QMJE32400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7ea6f57cbcc26e39b574adb8ce87f2e12187d7213023f7e0fdf92ca1febc9f. 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/QMJE32400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea2d3985df3442a096c0dbbdd1fa80947057f7645edea092af749395a16572a. 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/USA2P2212496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d84439dac217cfd98c6a0679b0cf0cbadcb30560df09ce0905018d95cc68db. 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/USQY51539578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bd85501da56732a9c9e1b5298bf2f2f8a858e23eabe80b3b91b4f8cd95aab0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM6XS1902953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284567cdef61a78779cf85d8e3170a13e16a750bfb650b13e6fadcce062bfb52. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QM6MZ1452579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85150e0134169e6de89524066ab5732da7f9864f6088ba65cef7eb3badf7dfd5. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GB7GV1590001.
The Essence of J. Rawls (Fifteenth Anniversary Redux)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e86305822d9ef77793480ee526e79d037762b1c4890f1ee0743aa219474236a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEQ121639662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506d14de3aa705ba6ee8ac9595187109900423135961318707126558e5d3c592. 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/JPD730800132.