Melvin Lewis Calhoun Jr. (born January 1, 1977), better known by his stage name Kutt Calhoun, is an American rapper from Kansas City, Missouri. He began his career in the late 1990s as part of the cit
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 0x5cda03e2a6705dc58f88646f4141bff795fb732c6ec31815f639863994ece3ed. 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/990dfdc3-8959-4947-8302-0dcf517dc86c.json and https://artists.proofprofile.net/proofs/artist/990dfdc3-8959-4947-8302-0dcf517dc86c.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 0xceedb375e63dd56fef319c46bd03bd04aa722a1bb380398333eaa6930c49590b. 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/USQY50816359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbffd3eb10055beafe75f15600779642a3d72040b4bc4142de7f20a71e05978. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/USQY50816360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf19eab29b527e18d7580052349b20d55099c4bcf6bd2b1541302f77e9ed98a. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USQY50816361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3402bcf3551a6dc2e3ffd22cad468be3fff666d74f5922c8dec5c96167eff0c1. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USQY50816362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd49a582885dbf8280d643886c95a3ce02f48ef409687df166fbd1a2de1dfe66. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USQY50816366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c682ee6d67d67a7775f98c1234c862127b80cd31cf812dfdf3d076e8fbccbb. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USQY50816368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e9af6e4f2bdf734dafd5a054dd41fe2bccdb377374709d216df46298083783. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USQY50816374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2226e6b6d77a5c7b6234c4f140fc6176004910fc7dce496ca86bee3cdf010c10. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USQY50816375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43930500064003c23a969a8774eb8982e2919c3adfb9357bfcec372232d8aaa5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USZXT1010659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd84539f37c446a26663cae90f9ef3d0eda4a5f438526566f046e5445cb8aca1. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USQY51111185.
501s and Rightsides (feat. Brotha Lynch Hung)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd74a9e20ac5a0710e58c0ba7cd4bc2bd7bce59cedbea1e0506b0d0746af127b. 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/USQY51304193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd649364450c94bcfb6d565119911aacd9b733fd66a1970f4a89e9368f564476c. 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/USQY51304195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94b754f01147fdeb0f654e35528e3a5abb7e606b44d15e16242ea5c41542b71. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USQY51304196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e98b173079d27b4dfdfadef56cba5037e35b3762f9bb0c70d58ae305131100. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USQY51304198.
It’s Goin’ Down (feat. BG Bulletwound & Snug Brim)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e559b8d26aa8bda40bfcfcec51817dcd2e8aecc229faa2be6842b11ba30c35. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/USQY51304200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10959e82bd2630604391ca81c27ecdd1fe6786e69951530fc3d27c6c577ca9f0. 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/USUYG1072718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cead9d3d63dddab860463affb9b59b027b6c247afe83dd02fb41ed2a3c6dfa. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USUYG1106586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0cb69fe860244316b86838c3f0fc8dec859b4e7fd7d3b5b5f44c35ff11d602. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USUYG1248114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39a0fbf602cd628ad7337b3527d99eef3b8c252ba64ce308dd5bf3eab5a73a2. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/USUYG1467463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83299746167db8e982855de4c6edf3e8b8290d313de8a294e132231a2d91a975. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USUYG1575125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8fee5f72d6bcd466357e42444f3e573f5eb0067aab431cfc25da4f4b59e5d4. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USUYG1575127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c4f139f8b76d78078e2aeefc1ec7fcae1c0af42cb24d9d99c37af296452e4d. 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/USQY51176102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3f06a8aa154c7f2c459cad3e5093d32fed610fe8f4b6d09f7c3ab41834815e. 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/USQY51176093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc004b01c8d0870da79dabef097f7be063a6cb0a6757650077967d1239dfe6fdf. 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/USQY51441808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae956015d95af58d1155fba25602429800e87c8b5305cd22b3a0f460dc3d0d4. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/USQY51176104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe332aab4758aa40ae541b8c3b2170b9849b54843c0a6c82285aa33cba9017c63. 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/USQY51176107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435de0f4ddeeec532168660f47d37eeacb92a3f072f2569bad174173410e37d7. 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/USQY51441813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc004b01c8d0870da79dabef097f7be063a6cb0a6757650077967d1239dfe6fdf. 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/USQY51441808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435de0f4ddeeec532168660f47d37eeacb92a3f072f2569bad174173410e37d7. 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/USQY51441813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c70fb2fefd811784e2ea3be12e7f2178a2a154e071228247c3162f9d0e867ac. 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/USZXT1016244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb947065606351d79715508419396171b8677f9176063714536e12fdbf41de05c. 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/USZXT1016247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0638f03495778b8030e32657562a867947669011ca8d64a54b42802926e4836. 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/USZXT1016251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74f974f371fff4368ef5971df45ad645d3047ad14120f66bee8c92d069cf44c. 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/USZXT0910143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226e69b1a5ed268e6ea6bfdeb6f54942eb6a0fe6ff9527c716bc48cf7273fefa. 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/USZHR0700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5112e5a2365f50e84f8a57d49fb736d5b4c1c15605c5f8b29529b92029aedf. 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/USZHR0700041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c7c8b398adc36ee900c0b5a04837c3ad763cd057d92a3c84d764087b75bb96. 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/USZHR0700042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad3ac9903e3d9e876ce40837297b661ca05a89a6321bec592d33ac906848890. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USY252298343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8079361f19ebc86a1202a6fcf095f3c93945d4a2b2e71ed840b3480904d55bdd. 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/QZDA82065631.