Keith Matthew Thornton (born October 7, 1963), better known by his stage name Kool Keith, is an American rapper and record producer known for his surreal, abstract, and often profane or incomprehensib
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 0xb30f36bc1b3b07dd3452a7c730a371b18c39d7a5dcffef1a2735f2e7cb3ae1f9. 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/a2ef7405-c877-49cb-8f34-a517f2cbc0b2.json and https://artists.proofprofile.net/proofs/artist/a2ef7405-c877-49cb-8f34-a517f2cbc0b2.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 0xb7736f2f19e3576767435befbf40e61c195a45bb739093dc6928492e36c8bd00. 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/QM6P41559421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90fb1d110d7a2488490fab7f396ad61a7131443e16dbcfdd9e0f7e3129b0e8c. 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/QM6P41559423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d93ea90a09199b00d7606e6b809409e91647b9b3ab07305bf42d8ba253e921. 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/QM6P41559424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba8e0fbb886e967fc9726205e54e953ee15f2e0d44e5e4ee147059ad7976138. 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/QM6P41559429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bba04add71689a56db4ccc6c6639240e93a0ecc4544507dc0adc7866712acb. 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/QM4TX1559270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68d14fb5fa93c58a17e9afe12d8d28134c137fe44b14d57c20d69a00e7dac3f. 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/QM4TX1559271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b39a8bbb77092fe586c3d7499ae21bfe5958f104c63665fe8a277b25bd393a7. 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/QM4TX1559272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3a0c952cf7b90e7caeeb79ea94f159348104828478d92a889c76294853f632. 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/QM4TX1559273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e74a54b092d6b2992dcc207330c3925eba22b90f866a57271306cf1de525bf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM4TX1559274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d38c71e080492669c42527280dd176f34628a20d8d2e80e178c0ce1cde29f8. 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/QM4TX1559275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7f7c45a9c86fdba7fd2dc9c6534a28386762994bd496616cbcb985a91c79b5. 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/QM4TX1559276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1482916694fc57f973bc9de6825627dccf64e51a77629ce2368f00e9ecf0099c. 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/QM4TX1559278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8939ce425d4657d1dcd4ba0fcfb0bdff472e0ecfcc47ac063d886a1b92834efb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM4TX1559279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ed7961ea0cd0f034244f34e1a63d282518b736b412204618c5c14750f8bbd6. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QM4TX1559277.
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 0xb8697cf708be89d062875efcef6e56dc6a890b1a0746dc73209c2b6b3e375923. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QM4TX1559269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0183f9520929c50f466003923b38385897f68e36f9798f96353c3513b5992afb. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QM4TX1559280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5358dd2f4b1142a3ed1103d57ce7950566de3d8eff3079827dbaf5a571cd95fa. 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/AUDCB1701102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504562eadcb6a64492e41f92b1671488059ae02d208becbe8242bdc54b6d83cc. 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/QM6MZ1461974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bf29f22b23ae9107050e9992a26d00f0acddbc6e289dbc7125455c2f13fa06. 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/QZC5T2200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83869294036f1771609907228af8f13b342b521828e56839f42e4e0afddda0b0. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:26:34Z), 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/QZC5T2300187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6b9e21c04deccd04332afd7df4dcfa8b5504eb7357941339abfd604bd4edde. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM4TX2117409.