Jan Leonard Groth (25 February 1946 – 27 August 2014) was a Norwegian musician. Biography Groth was born in the borough of Greåker in Sarpsborg, Norway. He first made his name in the early 1970s as a
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 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 0x3d909a46d392065e6f5405e0cb427916d4ce8ac8027e29f48d2117710d1326f1. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1eb458ce-9695-4ca5-9bfc-79c62ec48fbe.json and https://artists.proofprofile.net/proofs/artist/1eb458ce-9695-4ca5-9bfc-79c62ec48fbe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Good To Know (Where You're Going) (Remastered)
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 0x597dabf71e7f4719ee93acf94fb430e1ebda3ba0bc33649c74b6f0361a6bb408. 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/NOJRA9401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa99bf3069e970647ed9932ce222b97f1ad845465b8d9a7e9eb25043bba2a99. 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/NOJRA9502070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba14c9d3dfa533b1e5039b7b2949a05684b1e8327f29fae221411912a376b01f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NOJRA9502100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ad6de61db069e6db3550c3a4d2fb74513d2f6a49c3dcb2c2aab0c38df1f9a4. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/NOJRA0004010.
O Jesus Du Som Fyller Alt I Alle (25 Utvalgte Sanger)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7556dc12a9758a50978a8d36e85c1c2c4281d5f45108351bcbafe024eda4ad38. 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/NOJRA0708020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae86dc6a584a637ccdd90989abc55a18649fbdf286655f5b5591a766c12d6733. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NOJRA0708030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475323494022de97b5ade0912a225e60dcdb42c71a1deb87b024be086a4517cc. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NOJRA0708040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f78498803a31aed2a937968ec9e5f561a2e82ff8b17746a7fce47ec954e7aaf. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NOJRA0708050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff78a8893e9dcc4a8c671a0381064b4210d7f3faa6a25e109ebfabccfc32518. 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/NOJRA0708060.
Jeg Har Nået Sions Sollyse Høye (Her Fra Tind Til Tind)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27c32bf7433b44392beec2918bb49c0f1743848bf8e1807a5e515337eed0431. 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/NOJRA0708070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3d946efed9300e735c32aa62830b2b80c8bdc54822a6755ad06e11e0abef0b. 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/NOJRA0708080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd275cb65b61d7730b795955f0ac28d6e008531251caaf43af7ff108400fd6d35. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NOJRA0708100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ace31e455b4042448573e71b0a2e146301b5e83e6c8ad2ef2a29bf3c8fb3ced. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NOJRA0708110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060ff5267bd8dc15c0f5f7e078b07bec2d682e8be68cef5f0b6c1c55360ebeeb. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NOJRA0708140.
Det Var Ei Noen Blomst (Oppstandelsesversjon)
Aage Samuelsen-Sangene Og Annet Arvegods
Aage Samuelsen-sangene og annet Arvegods
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef524d2456f0171bc8882c8dc0559f97d0bff6ad7646cc77d2c530f29a4de0b2. 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/NOJRA0212020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eea2a0919ccaf5e22a51d8141cac94067ebbc5b303db065fa8b097ded5f58d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NOJRA0212150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e930c7391f1494e1346a30c6565fa7400b6f22e87012f6d5dd1e5840dead72. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/NOJRA0715050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e7d4146e3a40d10ce386a3f5ff14045251f1e8303c7635fc3932ad8990faa2. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NOJRA0212140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf8995fae691f19fd80210142ccdf32372608f484c84c2ddd266518cfd1f1f3. 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/QMDA71564145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cad2fd7428c9358625c1dd39250e5342c4689bdd18e679f1d05fe27caad95a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NOJRA5833020.