Mats Eilertsen (born 4 March 1975) is a Norwegian jazz musician and composer. He is known for recording with numerous bands, including the Maria Kannegaard Trio, Ola Kvernberg, Nils Økland, Eldbjørg R
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 0xf1600b987053c5c8f693f90fd12084b5c338926418bb2ffeb7694822d2f91df6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/584fdf86-3019-4b1f-8475-f7aade1deb2c.json and https://artists.proofprofile.net/proofs/artist/584fdf86-3019-4b1f-8475-f7aade1deb2c.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 0x5973395727dc6d22da2b80c5bc361103990e4f3fec5f9ecc8c50659f7298540f. 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/DEB332176401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7789070f484670b53edc54089fcd4070f1117e92ea93601ba56b412d08320038. 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/DEB332176402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2135705a0becff94548a007429459c50977d4515353a22d18c2ea213970ca815. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEB332176405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba04362502c9c4cbd3e038bb298c40de781f4ca4bf831b449c8ded2d6014d11. 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/DEB332176406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0483efa945f220e483e20547275518fb5fbdf883154ab1ca199ea0d84ff805. 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/DEB332176409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ddbbde937a608b6210f22e4234c8d41dbab423071dffc8fa99a8eb4752381b. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:49:42Z), 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/DEB332176403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e558a80b0c638cdb15180dcfa47ace0e3df1efef1b9c285e84e31e4188f272. 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/NO84M2101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545003a26c9f1d4ac58ea5cd9d939ee232c5705c8db0a2ad52868bc3e64d7566. 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/NLB150400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa989b8f2e3d516861375d8a928a25c9ebd688c7fef3dc3c9d125a602d2b358ac. 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/NOFGH1934020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0b3687e1b9101ab2ff082a005e24dc08698d802ff09dddf02598b1af22ddb9. 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/NOFGH1934030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0b0d15a20a11f74a046b1a98c4538cb867a4a79570fcd5d73333f3027b7b81. 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/NOFGH1934050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6577c41dceb394fac2683cd7a7333ad15c1940345f22bbf4abe53c8d0475070. 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/NOFGH1934060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0fe4ab68803157bb1d054c06f4dc3a9e2bdf36a65a512d2a764cfe2fa04830. 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/NOFGH1934070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d02833922df4183cd414a559d3c6888e9e86043087c15df01ad7c9fd977773. 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/NOFGH1906010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80162689d66371b8ba2d15f5a6fbbdc36e15d3d9e0af1da1c85161d98afc9c9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEB331861901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598195312cf1a68066f32b75822dd5c0506613776e133d2e91d4a955553b1618. 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/DEB331861902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c4ae5bfcf594d70019647c76ddfa96c68ad47cec4ca9e4aa133fe286d2f9c1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEB331861903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d92332bc2d71deef2b8a10cd7ce4502e9b1b0e2a49caa799289f03d5e0e7ce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEB331861904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1dac7f31b96a9b69ed87f1a8d3b250bf8fefd9985765920a12b47c368d1b14a. 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/DEB331861905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf21e01ec64b3c55fa2435f668d4b74b18e8d74da0b2477666663aa2b78b9a53. 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/DEB331861906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb1af61890ffefdda2c071119f2688a4db913f4365d7c34a3622e564f1ad1f7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEB331861907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36063b53b81faf528c9b77e51a977774534dbbbbcbfa98a616e1f4edd74c918. 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/DEB331861909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8fadea453c31086fcac66010d28303d90bf1eda749d3f7f926651b2fb22595. 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/DEB331861910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d4782db264df846bb62f2da189ba9eba8b10634817a047fc3a1117a28e0429. 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/NOCTH1728010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaa78f7c83cba3309d94ae9dd75b3fb8b9d13afaab154a125b4d2e994a78033. 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/NOCTH1728100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf5428c89d1c9d412101f055a98262ec1aa1b95450d749dfc8012b219ad4d50. 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/DEB331546902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9299de0efe6fc49e4819eb94544ff3d75751a7e9f3014afb5b24d5a3acbdd6d7. 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/DEB331546903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8937f1377aeb2b7ccd044000af0f934aed7c18a3fd92be0dbc75815fd24ab6. 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/DEB331546909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fb5055af37ec15045be199ffd5776517aef1f5af5312ba422c97f4249df9ca. 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/DEB331546910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ac079a88783a8c7c39b825f4b6c23aeeeb392fcd5c58e88e4fc1a946c502f2. 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/QMBZ92271310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c4ae5bfcf594d70019647c76ddfa96c68ad47cec4ca9e4aa133fe286d2f9c1. 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/DEB331861903.