Joakim Jan Aril "Jack" Berntsen (14 October 1940 – 5 October 2010) was a Norwegian philologist, songwriter and folk singer. He was born in Kjøpsvik in Tysfjord Municipality. He grew up in Hamarøy Mun
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 0x151f9f83ccd94ac02711f6cd80bf9d5a7277208c21106c019ec9bc6785d0b8a7. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b6a8df1-3130-4566-958f-97efaf856c4c.json and https://artists.proofprofile.net/proofs/artist/0b6a8df1-3130-4566-958f-97efaf856c4c.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 0xe505c5d03cc1e4e4cd323de4b84f0a767bc4abddce118fe8be00f8de5621be48. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:20:21Z), 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/NOLTA1501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bfd8d73522bca0734ff81c07feb92dfcda0b3df273b6c353e33c3abd214fd7. 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/NOLTA1501020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29ca43b2b966c14007840c1fcd7ab1ab59406d453a07f00d9ce020b237823e8. 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/NOLTA1501030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f031d92d5fbc9bda8e51b6484756f6c05e806cfd985cb9cb2afec9fc8a2349. 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/NOLTA1501050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60889b7577991d41f3af20980ef4abe92869b246bddcf32b9521f1aa53ee79d5. 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/NOLTA1501060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32d030da06dce32456356b8dc8958c2a925cd74e54015703046e4a68d44f990. 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/NOLTA1501110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbb83e0bcbdb45d6467e7b77a7cc3bd216e2d851db30306e715ac72c70f5ca3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NOLTA1501090.
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 0xedf448b14f42941a174f8925c6c58475140eb32641f292c99fbb134b08935de7. 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/NOLTA1703050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12453c353699df83f277b05fd6d3dbfc946e267568fe5c93ac64233619b7f7d2. 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/NOLTA1703080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57000ba2450f81a898cc80e44e2ab0206ba73e7a47d8ddf7d246bf4d44aac9eb. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/NOLTA1703010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf69d27cfaf894ec86820fbe5e55ff443be1a36b430d1525ca05b9f337f5334. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NOLTA1703070.
Med Røde Roser - the Best of Jack Berntsen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ec2da0226541202522cdcd70f46a109d37d9344e3753efd2bacf39dc257399. 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/NODGN1511010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eab0c0e8c77d42a53769764a0182d8b2eaa767981cd7fb5f074ba2f6f9e0ce. 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/NODGN1511080.