Kristoffer Eikrem (born 6 June 1989 in Molde, Norway) is a Norwegian jazz musician (trumpet), composer and photographer, based in Oslo, Norway. Career Eikrem holds a bachelor's degree in jazz perfo
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 0x6496c525deac6c2c6b29184346c2f08894724ce86fc46ef3aaeddf9e37b6d239. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0375980e-ef0a-4f84-b134-4fc59c467473.json and https://artists.proofprofile.net/proofs/artist/0375980e-ef0a-4f84-b134-4fc59c467473.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 0x99543b006f8f75bd5f37cbb803b1f66b1860f8c880a185600cc1709249ad44a5. 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/QM3DF2189839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d2095bb483faa06bb1b7023476248677d98e5dbcc487db1b7cf9868efe2f40. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF2251650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38276861ea1310e3e438cf0b9203a73fb27435ee929d851b2060725e1e378ba. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US3DF2259127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a1b0e81e4f8e5e7b2240d70002f9cae59e16e55abc124f41eb5e70c35e04da. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/US3DF2297227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ab77a45c92bfe3309f48d5db9409977430e1097ee86fd4d6719b8ff3ce3d2d. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/USANG2210684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5433b39e02de343bea2b18528aeb0f93ca3343835968449dca18227ec81e0af3. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:06:20Z), 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/USANG2205923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3add51106e6392102d4f79ac12662f0edbfbd1b2b5104dcfb2536270d714e5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USANG2210695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34090b66b112e68d5ba2670284ef6608f7c997458e55ffc2aeb718a1b74d62c2. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USANG2210694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa005d93701d2c2a1ae3bb97428fe52fa4f31432e32994c7334656564a9f467be. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USANG2210693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4180aeee89ce8efe3f2aee9f923f3ba6beb54e8c715c16b1eb199a41857035f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USANG2210692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edcb13b80bf08530290d0d0a259585263e1b60bc4d2de243c903fb0f851bdee. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USANG2210690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4e6ecc0a0a77db2e90dfcf3cb41f78ecfecf8efc3ee1556df2d9162cc0bb9d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USANG2210688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d042bc4274c780be64d36989d2eb5bbb7e574446b3826007ac5d863da56a1ee. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:37:57Z), 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/USANG2210687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79f9f7b432aff8cafa79946b260a68c77f457bb5adb90db4ccc6e3515cf4183. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/USANG2210685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d95caeed38aeddd408d5831e43a90bd7405d145107289099b5f9379a12018a. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USANG2240180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503465e70e297d3b8d89253434fac5054965ad6e60845826b2d1688a86e94b20. 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/QM3DF2257201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b7295666728dd578b3a36b759cac5617445da8ca28078796193ad46f942fcb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM3DF2257202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a59fe6baee48089ed8f7e75eff374d3b1534fe212350dacfea6176d4fceaa2. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QM3DF2257203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3bf7d17e918beb75aaf5545e9f36e373e4811dce750cdda8c6effcd4903cd6. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QM3DF2257204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a6c644ade7598d7b68ac3f0ee0cd24523d45f01f13904708d27c6f4d9d1642. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-17T08:59:13Z), 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/QM3DF2298147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8256e3f78cda7996c3b238ea40273255c1c37108f41bf6d38f5080cd17bfdbb8. 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/US3DF2464355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9506ddccc7096bb8a5564ac92a36db831ad7ef3555b789bbc0e24db58ff72e54. 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/CH7812419650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c84c84a9f285a19eae36f1dbe7ffc65b4df8aed5f2e459437b7ef149c3febec. 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/NOPTR2514010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84106bfb459f78eda38d7a48db1ee84e0ad84072070af496403fd02ee643349e. 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/NL1LE2202638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8055a658c5199742442d54c1500376e332a7a5ba6809ecd976d6ac8278c655ce. 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/FR9Z62100597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a106f20eb7aa9b41dd5d52fab445eb0482102f7a9eb413f1e6e4f76c7235e3. 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/DGA0Q2352507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c43cbc689f2753e47759fc40beb05d54321bc82fb4fb274be768ace57d6add. 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/CH7812402649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a344e9612c0f5152dbcd3625e36600516d3569a63f3856bca50c6c805c64e40. 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/USANG2251098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8216b24362c8098240ba963f1325b6e33d59d664671a76ba51e3ca0e9a2f0785. 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/USANG2271560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bf45c16e9568a36d8ec960e86e0672f448def418f87f47a16d83d07ce63859. 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/NOXYO1704180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca82358566325afa38cd181e14c3b55ce82fd6308e4a9ee5d578e2c238284d2. 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/FR9Z62400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b36cd449b6f4b137619758af434caf86c269cf35916cbb61ae1a981c7720d2. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/NOXYO1704150.
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