Toyan aka Ranking Toyan (born Byron Everton Letts, died 1991) was a Jamaican reggae deejay active since the mid-1970s and best known for his early 1980s recordings. Biography Toyan began his career i
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 0xc1a5853fc664ed6fc5d7f36465ed6c617c839cad7d7e1d903a7970dab9e66aee. 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/10dd3ed0-cbe2-4f6c-a453-e0ae9fd48d26.json and https://artists.proofprofile.net/proofs/artist/10dd3ed0-cbe2-4f6c-a453-e0ae9fd48d26.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 0xba35acf4703093d89e9ec46bc3abe8bd83dd831fe0fbf1073582c995abaaff6e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBBZV8104724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c477ebe587e1258b296e2bcde4d9625f82728440afedb2fbc314ad49f91abe. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBBZV8106660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45d0d196537252e66588d9064c043e411176484bfaaba971712d432b0403337. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/GBBZV8108596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162a7359b8c7576cf9bdd444ff5bcbf54ae6444644b98103fedf0b3fd3618b50. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBBZV8112468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd9b9da16ab6b61a1b083df0c1a3f153060d2736ae1c76725f16ec811716f67. 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/GBBZV8114404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f6c749f0ac6ebd36b38c7f7974ff126bce6bdce37dcb10aeedc6f4358990c6. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/GBBZV8202800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6d11018a6ebf1d19e8f54f495f3fe916f05c4c84f3ff6e4059f110cd7d0d8e. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/USVPR0713474.
Junjo Presents: The Evil Curse Of The Vampires
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd9b9da16ab6b61a1b083df0c1a3f153060d2736ae1c76725f16ec811716f67. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBBZV8114404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162a7359b8c7576cf9bdd444ff5bcbf54ae6444644b98103fedf0b3fd3618b50. 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/GBBZV8112468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45d0d196537252e66588d9064c043e411176484bfaaba971712d432b0403337. 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/GBBZV8108596.
Reggae Anthology: Henry "Junjo" Lawes - Volcano Eruption
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398f34a483e5cefa9b9e1862d630c715c9a0a657dea84c5c749489c41c1ab337. 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/USVPR0916304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c65560755756e49fdca557ba9d9f3af792c3f8d9e58760b75f4b602ca981f16. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USVPR0916309.
Total Reggae: Greensleeves 40th (1977-2017)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb149bbc7a84d6b7543a4d25d6591f4e494bc8d3474b35056b85e30d513c12f5. 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/USVPR1700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00878bc8ec9c6ad64ddfaed9a849f92b7c5b93627a080f0d74236a61ca430bd. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBBZV8204358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b6fb666bdcfbe8d22910264127a27179c0c56297a69032d5b748c3a7881217. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USVPR1500498.
George Phang: Power House Selector's Choice Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64af138598108cab22b7726e64d2f7e05382e91bd39fcc015b7cae4a977bedac. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USVPR0814410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd289b1ce2534459ac7910b9f45c699522a0be46eb40f8c81b43daf107eedf5e7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBBZV8153857.
Dancehall: The Rise of Jamaican Dancehall Culture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d669dc47c0b23051ef51c158380d7723e8a0dca1418fe63a052ffc6773b98a. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/GBBZV0201861.
George Phang: Power House Selector's Choice Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98380e83d8d0df74dc75c2b5de3a9bd1cee7f0b1e0e9cf7d29f49c03b1afc8c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USVPR0814369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa440e79b15cb9c54c39b934c6f1ce1247351faec62ccac2c0174a3d521c7503b. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/USVPR0814374.
Dread Meets Greensleeves - A Westside Revolution
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe052fe467e3f4eecf0696954c5e698ce209f849a53a80f69eca321a740b55ba. 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/GBBZV8101484.