Sander Kleinenberg (; born 29 December 1971) is a Dutch disc jockey, VDJ, and record producer. He founded and runs Little Mountain Recordings and THIS IS Recordings. Kleinenberg is well known for his
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 0xe7bae791ba12531deb8b6cd8b02c3f4f73774f30d6c396dd87149da6cd2a9bad. 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/ac518246-e7c4-4175-9dd9-3a0f2a7393db.json and https://artists.proofprofile.net/proofs/artist/ac518246-e7c4-4175-9dd9-3a0f2a7393db.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 0xc0fde4d2408b7f08eda3646a310351dd2d793f637cc84a2fe3431f1645f77d03. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLF712402200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057289f8070528d77041e90acb0e349e26674f17040b0715a1df5b6189928f29. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:07:44Z), 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/NLF712401376.
This Is New York (Including Cedric Gervais Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a92c9255119bb387238264826791e9ccc835a687bfecef1fa82a302322871a4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLF712402215.
R.Y.A.N.L. (Rock You All Night Long) [Including Remixes]
Can You Feel It (feat. Gwen McCrae) [Club Mix]
Can You Feel It (feat. Gwen McCrae) - Club Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edb7d5372dfa8fea35dc9564e8a837e903f5bba16e71cd2604645e20f87ab99. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLZ541400890.
Can You Feel It (feat. Gwen McCrae) [Radio Edit]
Can You Feel It (feat. Gwen McCrae) - Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be0704ec5818041add0d43289113e754eb48ceddb2e11cd41a2e63572eb8f24. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:54:38Z), 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/NLZ541401008.
Wicked Things (feat. Audio Bullys) - Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e80616573d8c2e2aa255a6f76359b2b63e9c0c084c817cd3a4c48db95e4471. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLZ541500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7368d7c5bb031990f7a1263447298deee63e98be81549aaf7abdad9de37b9ee5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/NLZ541501106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d72a159df75dc115418bc4b64e0189a2ac362fa4e6e59bfe6c65ea7cb6d76d4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLF711700761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c224fa8d7fffefc7b361b02e36d25b445a36ccfc621bdb6316922ee6fb7532. 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/NLF711701459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3985d45264c3efc17dd579df43456f44151ffba35a782d08fe784a0b34aa6df9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLF711800289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924f2060a30817af6565d37078738ebc1f6822ebb1181a63023ff37d68a60c3f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLZ541900562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7c132e7bef8c8f9fe7cd773f1141fc5b211e2341d1fd5644d9d146d0fa6543. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:41:48Z), 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/NLF711912415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543790dba60206a177a6b6d81cd9aec43fc47e1995421d457e7be658209418f8. 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/NLF711302733.
50 Best Trance Hits Ever (Extended Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750ce2c8d7b9ed98e61f7258aa2ed0821a6a4be49945f843125a5563abe3f313. 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/NLCY30802048.
Love Emulator (Sander Kleinenberg Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829c611482f525a8522d421d3b7236a60ffd6a01582bfa096523e84b605da7ea. 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/DEAR41053033.
Bitch I'm Madonna (feat. Nicki Minaj) [Sander Kleinenberg Video Edit] - 2022 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fdf64221fff1e8e766ec8c3154dcdb77a3b3736f1cb4618bdc7d386a0e5866. 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/USUG12104382.
Rock Your Body - Sander Kleinenberg's Just In The Club Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878fc7f8b87ec2109d4b29584b7f7c4568eb7fcf27043f6c6b9c5780e3add225. 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/USJI10300084.
All Nite (Don't Stop) - Sander Kleinenberg's Everybody Club Mix
Kalberg & Molijn for Unmanageable Artists
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284533f40a13fd27292bb5993b56af8801d91f7049d9e1cd507bd5dc34bf3294. 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/USVI20400191.
All Nite (Don't Stop) - Sander Kleinenberg's Radio Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2d13202cd57a61ce6936b88e7acb24bd205eacb4827d11c74d98a661efe20f. 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/USVI20400225.
Birds Of Love - Sander Kleinenberg Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaf910d037872f620050ee5df6f0494f250c37bd2c743fa269fbf8e9ebf19ea. 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/NLF711800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24972094668745300da18dbe1d203aa15bae493db1ff32563e690744906de88. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NLF711102699.
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
Deep House Top 1000, Vol. 1 - Armada Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945b269ce20a26f8b0197696d1e75629f53937e3cf797e9fa42505adcc05c97c. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/NLF711605497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c90ac167bafa30ed82a192f09529dae84ca59ca756bfa69d6bfe1a9f358af02. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QMSDU1600021.