K-Klass are a Welsh/English electronic music group from Wrexham, Wales and Chester, England, who are based in Manchester, England. Its original members were Andy Williams, Carl Thomas, Russ Morgan and
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 0x07faea49a88334e63ae2e35c3d8775c78474a06c3c40bff226ecbdb64fd05e65. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f6aa684-8ca6-4130-8d97-18b020001d18.json and https://artists.proofprofile.net/proofs/artist/1f6aa684-8ca6-4130-8d97-18b020001d18.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 0x2c647aa9a90ce66c13967db695f66a42524397cfa7d76c0a07e5027c0814d6cf. 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/GBSXS1900077.
Rhythm Is A Mystery (Harry Romero Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50b51053266ffd1791c4f93d00192fcb4b1ab42a5b4cd6217958be4748edfb1. 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/GBAYE9300982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d31cba40beb2ceba4dd0cffcce6fa11ad69380e03738002e7b37214cf2dcd2. 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/GBAYE9100114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc52d8785e41095233ca5d08c3982f4006c372f95f19d08db5a1f8760586540. 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/GBAYE9300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcda3db714b5d8d3134a954340c7525098b22789651ab32ed13228f55687b2e8. 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/GBAYE9300986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c731913391632b4e603379b3a4b96e0c6654e1aff2948fc7af303031b05f734. 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/GBAYE9300990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60850ccc667174a852b8798da28e614e3c4966e46632b129bc15b44940e517eb. 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/GBAYE9300988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7417cc67c1a23b7bb2b8d209e9fb8e623528ac34139a076e33299051374862. 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/GBAYE9300985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae77fcd77faa7c93a6de1d4ec657d6753a1268d6bede94fbd90bc9aee0c866b. 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/USA371430308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f28e11d083ff8bd7081826e93460dbb75d8353055682e8bb88c9333ecf8c5f3. 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/USA371430310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d8cfe2cef369523f994bd222dd0d98ac46d5ab770d477bcf5b036c3a14bd09. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAYE9800997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3741fc65bfcf11f120a92bb428ae27fb06ce44c1d38383f3e5c1b165b6fc853. 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/GBAYE9400781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fb33d139bc24c43aa8c29ea72e5dbb0eb08f3dbe9e39df860938a8d6c2f777. 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/GBAYE9201226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49baf0d9eb3890385b53e01afff88410dcd4a7584baf59b9b0da3c751b8c99df. 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/GBAYE9201293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e60b79597b549fb261c224b5f4e654b9f593d2b2ec8ae712d2c8c7741b0e66c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAYE9300856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633b1847d4e90be696c2f8981e5545c6ec2d63703d0bef49fd423b44087a6857. 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/GBAYE9802386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7962a1ed5f256234f1488bb5dfaa8694b4bd116a88c98d627e61955f81951de5. 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/UKHKF1240081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a16b5c569897d769c9dc78e04e20a91c3bbe99be7621890d52fd60577818ca. 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/UKHKF1240086.
Rhythm Is A Mystery (30th Anniversary Remixes)
Rhythm Is A Mystery - K-Klass Remix Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0144f6e5b6334212bc65129709ae5382706279ee00b7ac86f8b23b8ab0ef9ca. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBPN72100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21afd66cb9c3fddb500b8581ee570aefb9b63e046c020865f8130270cb541d8. 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/GBPN71500031.
Let Me Show You - K-Klass 2015 Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8599454826c4ef6b7ff8b4515eef17176c1011d57bd5cd4c222294d53310ee72. 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/GBPN71500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7442c10b7388b56e1dea0a5d7f26654da9b131fe5ed9669f805b70ec8cd019b3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBPN71400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f451806fb50ad1d2fc2ef9f20a507cf8bce91be311bbca7676cc1a409835017. 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/GBPN71200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88a47dc030edd54b08d9b2ca794227672d02c6788c8bd5925e916bbe0e2ca9e. 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/GBKQU1292620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ee125eb9e850f4c41006ebf058c9fab0af4d4ffa9f8596202c5d9f1a539c51. 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/USA371430294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69801ec575bb42bbdd2a75be06cc3e7d3af8d2dc2d2b5660bb246b53e2e08a83. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA371430295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ddeb2ed0f7777b92755b176cd23698d3be9262c127ca44b1bdc08b69884b81. 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/NLQ201100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370f06bbd0062ff89a31c8e23dc6635748693f27ec3281ed33b80e3994f339b3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX201762294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d31cba40beb2ceba4dd0cffcce6fa11ad69380e03738002e7b37214cf2dcd2. 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/GBAYE9100114.
Naughty Girl - K-klass Solar Vocal Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146935c7a91674b22be1d74ad19c5dcad7c39a5cca731d6edeaf04d3a8c896e6. 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/GBAAP0200531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf13345988329f66dbde82a93336cdd15b1cd75115df124cd072b2d7fdb8c51. 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/USUM70853268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c8ff65b11cc3ebc09822dcb53d4a7a827b9388f3d40a16fe6465ea7cfb97e7. 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/GBKQU2437808.
Double Cross (K-Klass Remix) - K-Klass Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b2eba756edeeeabf15b941f8217b9a08ae4f7888aaad567368b82aa22daafb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2436824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b74d2904a53d54e452bd865f87fff8ac8664361d9865c0bc7de8f641019c15. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAAA9400811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68117a8e134f65d12fb8223e4f8f75523bdc10ab92efd0e3a59bf29497857ab6. 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/GBAAA9400821.