John Walker (born on 4 February 1982) known by his stage name, Kutski is a British radio DJ, from Chester, England. He presented various shows for BBC Radio 1, playing a variety of hard dance music, 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c30b4c250e1483ac16da6a4d4029c8b88a22957202b25bf46bea03405f93c0e. 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/48ff2117-0793-4e24-9b95-c39507f9c9b9.json and https://artists.proofprofile.net/proofs/artist/48ff2117-0793-4e24-9b95-c39507f9c9b9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Keeping The Rave Alive: The Album Vol. 3
The Hardest Records In The World, Vol. 2 (Mixed by Kutski)
Keeping The Rave Alive: The Ravers Revolution
The Hardest Records In The World, Vol. 3
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 0x4c4fea576bd34af5229757c8ff52097b7f294acb4442ce5ed436e8e09b16ef37. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBKQU1805434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1c1ee87c701fb1b70db435c806ebe166817a3876a67b2e9b216ab660ce7ca4. 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/GBLV61906234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75244f8a864385726626d5f9f86ab5587950402173bcae95fd3ad93796796e37. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CA5KR2058763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3eba3d7e5dde4ee679bbc0e30a6a4b0098a27f62c49dfb33dbe9efec1f1f2be. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU2191457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee0092d24bff3a15d37b3f0d9321ebf15f1467575bb9e0fb69d92184b1cdd06. 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/GBKQU2218502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d613d8dd97fb89b84803f9ad7162bfd43d26e0497afe3b419aa3015f002888. 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/GBLV62313282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf24c5607b5a0fc85025f257f3dc5a1915c22755f9b3697d4166f01dbe043e16. 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/GBLV62313283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af5f572f8f249881ceee51be49b411c419e4ee8be6b049c5b00299d9f639a1b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBKQU2540552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca95b0dc5d8e5874b4d4e4763d9c8bf54243b6c164005262a0732e70fbc8bb83. 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/GBKQU2331454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84613c27ca8060ad71780cd8b5c0420508b9e70de071aee0ad6f17907aa333b. 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/GBKQU1955053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ec968a2f770ebf2f5486cfc307b8c3386e43836182e23fafb2625af9ff62a0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLFL71900195.
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 0x051a15a65fba0013f120681835c1fae09a7824eb936029c04fb619b560e3a9b9. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BEB681300570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fc0b8d4fec7d5119ea95d09326d54f60b416a5471bdd4c3d773ab50535c79d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBKQU1955054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5964cb054e93ee59ee9a52ccb7543a71324e0a68e3e39afd3f87397a49dd7044. 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/GBKQU2307277.