Kareem Blake (born March 27, 1975), better known by his stage name Choclair, is a Canadian rapper. He was one of the most successful rappers in Canada in the late 1990s and early 2000s. Choclair has b
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 0xc6d8e60b69741da5557db0d1420e5a3182f7ec63f356188e9bf7b06d11e31f43. 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/e119b537-26b1-4190-819c-d03e59379e40.json and https://artists.proofprofile.net/proofs/artist/e119b537-26b1-4190-819c-d03e59379e40.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 0x889d183a7dea0cff17d4f38a6aaaa659d2c571b66faa9f56d7131fd5f218e95b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCAET2021487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422a381fd924c1935e5c5e3754f8e597d2debe6abbff61920623123881ab664d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAET2021879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d56b602a9b6a4c64b32f259b9c8e1ca14b1d32f72f4506f17603bad2aabb25. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/CAV119900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad80b9447ce60a3bccc986f8da7af0e75fc0d3593cc0643c323681181da0841d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/CAV110100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccd1b53c4e9c0f9238d1cfd812affa379d5a0d8d9d2086dd742e3a9dc68e016. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/DEQ022480055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a081ef8de2a534fee5aafc4e2af2229a35e605c35015a3b450f3ec667e23022. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/DEQ022480056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a75263367e56abd878ff377c040d5613cd53d2e483be8de1e710a91981ca9a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/DEQ022480057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759d5221388b7e605720610acf75f448dc4d107aa459af231d2bf1945239fc18. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEQ022480058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7269d8da161a8425c11f3b5f50e5723fa220484f98e7e025746b3bf28abaf430. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEQ022480060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c2c7ef8ce666e76e1ef5ab0459301e3a54bb9dd7ff799229dc93ab79827664. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEQ022480063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e40a7ed8c631f067a13bf6a734bcd6ff2ae63cac6cdf29e0315816abfae9eee. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CA3N11000001.
End of the Road (feat. Bishop Brigante & Darryl Riley)
All Night Long (feat. Classified & Karl Wolf)
T Dot (feat. Hue Hef, Donnie Darko, Sutter Kain & DJ Bless)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e5b8ed86d3df649a931b9ebfabf596d11fc1503269c05b11182eea2e24d7a1. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CAA0Q1442109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf284d75bd48bdb6fc12c7982e8eb7ce62ea607a20a5273ef93df921f73aad5d3. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAGL2201217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9badaf48db40f553fd7822d91c02340c53ba95865f4fc66eaf11fd1c1f33161. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USQY51207673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08eb46e5d3fd8d53e96a0aab62b37be1825b6f903461128551c2b62849637b2f. 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/CAUM81900389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2aa47746dd139c3049643d38b598ae0806a9cf0879095fc5cc830c03ff71812. 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/USTV10000696.