Markeyvius LaShun Cathey (born August 3, 1997), known professionally as Key Glock, is an American rapper, songwriter, and record producer. The cousin of late Memphis rapper Young Dolph, Cathey signed
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 0x7cf9005e10a052d114984415ea58e8f51d6f658d2817b672c1cb21861612dca0. 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/1ea9f047-2f0f-4722-8262-cf60d92e6c4d.json and https://artists.proofprofile.net/proofs/artist/1ea9f047-2f0f-4722-8262-cf60d92e6c4d.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 0x791305e85d5385f14b5149373a0a66c25ef45e8e65c7ae9537cf12fedddfc45e. 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/USUYG1314381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee85dd1f9e5ee17a8addfd87da4d863b82aed252e911c3418a994b0fc56ec5c2. 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/USUYG1226673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfab12b47acec320f96e46f9c02ac375d08b863da5957b49aa41098f2160c47. 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/USUYG1535258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56da204512e89bd7b549eec17eb16b11544aa8d18b769a940f82ec7344fbc2db. 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/US5ED2202598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c533396fea847dec4a77e6ee1abdf46b04eb45a55ec5c1a4263d29be2317277. 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/USRC12300566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcfc99413a0e41c49dbcd87b8641952ecff7fbffd3d66ce50c9d36d65395f16. 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/USUM71914464.
Blood All on it (feat. Key Glock, Young Dolph)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a8bd0cd37dde96e608c9b10f67dc2a73d7b9ba581fab2d21e3861354a94712. 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/USAT22202044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432104721bea55944ee5ac4840caedcfa158221d3f318d1151de4565c6d926ba. 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/USAT22005096.
Lifers (feat. Key Glock, Foogiano & Ola Runt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36807fa88429c321f6be207b6cb73963f386147be53b8337397110e2be3430dc. 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/USAT22004401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe6052ea8727c81bfac04b901362b50023d98a4bdc5fbb1b2c248c06aac07e2. 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/USUYG1281890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72b2b67cde271ea2bf1157f9f3ab74987b3c52c77113bc5f8823c33f0c8c823. 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/QM6N22427593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c30df7ff32ffec5b7381dc8ca4b8abaf2a2c5287a9848b7ea6719c8552c225c. 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/USUYG1266071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432104721bea55944ee5ac4840caedcfa158221d3f318d1151de4565c6d926ba. 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/USAT22005096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce8cad993254d26f3ac1180ee4c4ce3a0ca1b0a94026af656b510079fd0630f. 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/USUYG1263278.
Thank You For Believing (The Manifestation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5643266fa8b11bba7ba9af7cd786053de855508b2084a6455cac8e9d8e8ae64. 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/USUM72102873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac821817b862b53c5926bd51d1861fb8ec89b1f08b835b0c9e728872a3e2f71. 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/TCADH1795168.