Magnus August Høiberg (born 29 November 1987), known professionally as Cashmere Cat, is a Norwegian DJ and record producer. Often in tandem with Benny Blanco, he has been credited with production work
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 0x2ffc95cf24cfdcbc5198cb46624bd9ae126083b30b33973fe38954df44085a9c. 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/227df08d-9998-4dba-96d8-344f8e42f316.json and https://artists.proofprofile.net/proofs/artist/227df08d-9998-4dba-96d8-344f8e42f316.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 0x4a4939d16823eca51eef580449f6734ea802787f7f6da77842dab686510c45f3. 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/USUM71616086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97eb1ed327427454d291fa0043fcb6503a73dbcc49a00236a07574c311d8111. 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/USUM71609160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990cec4802dd156d567451085d1e2e28ba4402f2b19fd2a5d7afa104921b235e. 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/USUM71616091.
Wild Love (feat. The Weeknd & Francis and the Lights)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38939e8719308db6816958b56451a35c8ba085c297c0a9346098af490b5f7c8b. 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/USUM71607899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b06811e844213aa6de39eec0f99262c7af44b5fe190140b2ade9be219311f4c. 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/USUM71702753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a35eb99d8f9de39f97b21e930ffe0613cba4421b1095f7b68282a465adc5539. 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/USUM71702850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f3b950eb4e445dc317fb796b29a8f559393001e341349e9510f33d26abd1c0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM71702849.
Trust Nobody (feat. Selena Gomez & Tory Lanez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f74a8428682e69da3c853fdd924a9f34b375b5093e042e027c1615953d4d681. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM71609159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2afa9266bdafed12cb220020e7f8d01c47500cfdb4ae5bf7b5e14489bdf75e. 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/USUM71700660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb692264fd145d59601c492426c7b87e12b79d7caba35b292619ea57dd99957f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM71702848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb6c4370dac6fdeb688d1a4625e0e2c70729aecdbd525bfc8cb0ed930615ea4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM71902824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcecd551c96aef1c2696aa5f7d8e9b5f307262c63e9e8abec96959e78fa368e6. 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/USUM71918795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bca5cb94ec945cf1843ab210e9ac5e07257ddb0b43bdfa1e761797c590f8464. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM71918792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e20051a6706718caf58014c9e332f56349bde56392b63623eb0976d0bcb6f41. 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/USUM71912739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9cd86999aad30d9a63fb79d8010499df9268d710249654013f737fb3faa213. 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/USUM71918793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8bfdc33431644d61105e2fd3c183d5027c71aab369fe837ddf176d2a90f3e0. 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/USUM71918796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572586b2e988ba43c0552d478c6e89e27a56fee45ab92ce06b077bbd9cf54da1. 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/USUM71804105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7a1c6e868f138b7d59f01659dd1fdfade589dc3796491f88efa2d087847e22. 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/USUM71804106.
Miss You (with Major Lazer & Tory Lanez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df69a3fd3cc166a61a82458ae97e41ef86846010eb020179b3342e8eadea37f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM71615263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1d628c1cb9cb1107966393c896131cd30d08760fd801ac9e07502a5c62d3d5. 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/USUM71501964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27185237f68fa31e8e4d73f69b368d1488510d20abbc1e794d7f3fa451d35d43. 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/GB5P51400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc29dd3c291ba67a4b71c1fe022942fcb7ba250558a18d85669fc1874fcb9f6e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB5P51400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b9d4271df98569748f55be1685ac279fac8bbc48e2c73722518210b19e18de. 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/DEZ651212701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ab2f39eb229db109d79020e83af8a0dd254cc408a2f2112a0b36fef4e4c041. 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/DEZ651212703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4898a422c4a3cf48bd87362c74fe65d8bc7c95909d98f96b05785649bbbdff. 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/DEZ651212704.
3AM (feat. YoungBoy Never Broke Again & Cashmere Cat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cd2ee3a1b4f6372083b4b4e02440adcbeb0b0e8acd0b4d1685c475215691b2. 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/USUM71811452.