Hudkreft ("skin cancer" in Norwegian) are a Norwegian punk rock band from Oslo. Formed in 2016, they released several singles before their debut album Nevemagnet in 2021. In 2023, their second album,
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 0x3e28191fd63c0c0aea9d0e8ea537410cbd34fd9da5e23deed1f49021d0e3ec4d. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8cddd68-11f6-48ef-8dce-11c8aeccc4ae.json and https://artists.proofprofile.net/proofs/artist/b8cddd68-11f6-48ef-8dce-11c8aeccc4ae.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 0x23572b1502f7eaf04c1224581d252506062a8d5f83d2f41a6d1f07a99941aeec. 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/NOFYF2309010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c20459879c00e656b9ba6f25e817a63aba729bc92d0fdd13f5521b104846667. 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/NOFYF2309030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2aac70dcdcb5a01f91dab73b6dfc0fb1f62094a8590eda151a85e6bf392c1d. 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/NOFYF2309020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8411649edeb62c1088161b7448d4609a311d6294c850369f09d1a9adbb5eda4. 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/NOFYF2309050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1e96a65de030332a13f40557944db02dfe5cb83a29fe010f2378f60b34556d. 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/NOFYF2309060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacaa51f59cf73dedc1389b2942c68c6fd555d67e78c0a3aaca34b571ca1d0e1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NOFYF2212030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb459d6e1aeae3bf942ab4ba8cea07b802af1032cfd5ecb4f52aa472db2b1ed08. 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/NOFYF2212020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a417fb2e44ce21b6261ed6685030c2486a0c5729af321c45a1e585b58274fd. 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/NOFYF2309100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105764f237256d5a6677f8646da595a3dc86b23087fd4a014fa649c51e39b379. 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/NOFYF2309110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae86831b8a15c4a931beb76c2d255950c28950c8e54bcf69d510fcc89ce03a2. 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/NOFYF2309120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc948fa0a328c91ec8965e834d6f8988869142a5fea324fe6d8cd8f54322ce83a. 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/NOFYF2104010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b51ae3868baecaea22191371d9a96bd06ef14ad86f6bbf5f5662a3e58b53d2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NOFYF2104030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57853ad1cc8cc76acbd120cb1a0d0cadf4a5379b8d159d71c367bf60aad294d. 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/NOFYF2104040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d72c38be28398dc53efafa602e946649fc131ab7170547383e5ebf509f854c1. 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/NOFYF2104060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36da6c8f1897598838a5c6c07db3f4e11c85987e49e043efba5bc83a536e120f. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/NOFYF2104070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e0bb4826ba323152881505e36958b7be7bd2adff03e18e064ad21d57341eeb. 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/NOFYF2104090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b5264482191b346e85811419ccb48b9ebf67be83eed5ffe878a3f003e07fb7. 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/NOFYF2104110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba1f27556549e60e4acaa3997c100c072e18fd909c3ea1349a7b531af7d144a. 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/NOFYF2104120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979f5e78c3393abee99baf3c1b4f8fd1a1d82da59dfc33a2d387fb1705ff7382. 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/NOFYF2104130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c20459879c00e656b9ba6f25e817a63aba729bc92d0fdd13f5521b104846667. 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/NOFYF2309030.
Dubben er død og Center of the Universe drepte den
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb459d6e1aeae3bf942ab4ba8cea07b802af1032cfd5ecb4f52aa472db2b1ed08. 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/NOFYF2212020.