Carl Morten Iversen (1 May 1948 – 19 October 2023) was a Norwegian jazz musician (upright bass), and the son of jazz violinist Arild Iversen (1920–65). He was known from numerous recordings and had lo
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 0x370fbc26469c8681187dbc87c447fec6d06ab79c5b8b77fa8a0b48878272e1ea. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fea0766a-9a6f-48b2-8246-dbe084e03672.json and https://artists.proofprofile.net/proofs/artist/fea0766a-9a6f-48b2-8246-dbe084e03672.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 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 0x99bb370c802bc837e03ff5acc03afb6b4fb41367bfb30a6670df30d14a135890. 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/NOUM71101843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9c5bc08f98aab6fedbcc1f0ef7b947670a0f00587723c5f55f2a0bf1835c75. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NOUM71101844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cc9259000c6d23cc8a7f92f6dcd8372c59798012548f0bfe49b29f725a6620. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NOUM71101845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8b423cc7e46178a0774a2fe3535710089c2f571fa9dec5bc65e2134494be7c. 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/NOUM71101846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ff5da0d06a94a63339e7ce84c23a8c4d05b2e3a95088d0ec5afe4cb60cc887. 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/NOUM71101847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951023a35ff2dcecff95d6c800e64b5576cf1be56d9f85902a17a173034d8444. 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/NOUM71101848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc80f4cbae7bb95a0b4b6a5225d8694c97348fb8b15804d08105ce0562856ca. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NOUM71101849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d2d257059e708c46517f30372422b31b04e95a993bcc5f3b93182694e68eb5. 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/NOUM71101850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a41bf0ca2d2c953ce537de55df4bc47295fb9909a49393e01b2dbe3a1a2eefb. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/NOUM71101851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74744c2fd8cd0f751358a88d8c175f4884e337041cf4f9cd00ef017aa93c3763. 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/NOUM71101852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4820d03b24a511e5577ee1e1bd8b11f5ff60817a6f624e4405a97e4923a5c212. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NOUM71101854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578daa75f4f51e89381f2ec1306bd8b2552022aaf8662d5504a5637bc0c8a452. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NOUM71101855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94341283c9344bc363e1a5c237de2c5b0a8c5deefc9c76e1b10bf7676b2e666. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NOUM71101856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5ccd6859b256f4f102d613b3370eec46b12177540fceef614f46e7b5a827ce. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NOUM71101857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f39508f76c57ae420c9e963d1603f7c41fe2792caf908cf5db9e6e605fdc05b. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/NOUM71101859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe162f702a9367b7d3a21c66d8d9998b2b3d7a412a565b8d369e76abdf57a4f88. 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/NOUM71101858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edb89bd2a6f3ddef1dcd4d534ce2d6ac11bb77a965af74e2ce9b2fa8566dcc5. 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/NOUM71101860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7da86a7ab4c5abc0ef9bc5884f2049d07284afde10805c9067d9c5371313e1. 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/NOZLG1902010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ff9633d2cfa685f4cb925e6961e073b3dc9801b3394f0f8b74c5619b798ac9. 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/NOZLG1902020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bed0fdc51ae9753fa55836f68337d1be4d44bc801f7838983b99bed12db08b. 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/NOZLG1902030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acb666032a767b4e8185a8af8afa7e2a8789a7428601779c2fb33413241b70a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NOZLG1902040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe333c067aecfe3ba83730242db85553464ebd99bb720215be1d9d5a3ecd1cd93. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NOZLG1902110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38713e865d41c5f04dbf861fbc8e4805e624910ddfde858d1efd66449593c405. 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/NOZLG1902080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d10e69f9d1d5d00e7bd7c20464de5c175e518665a0af3f8b5b4f68caebd39f1. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NOZLG1902100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b87480c962a41e759a54179315b911e52ef074a7e67addfb0fb964e60a75fee. 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/NOZLG1902070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bf5542bb27ce1e960dc2e5188eb4dddb0faf31c9df9b145d065f97864cccf7. 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/NOZLG1902140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183d86ff0073b17584ce77ff8f3151acb576c33320e525dd55137048f0d77850. 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/NOZLG1902090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736790657e41c60002377ffd851f6e179333568bdb693038231ad19b867e09a7. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/NOZLG1902170.