Jonathan Fritzen (born October 11, 1982) is a Swedish contemporary jazz pianist and multi-instrumentalist. Biography Fritzen was born in Stockholm, Sweden to a Swedish mother, flutist Katarina Fri
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 0x7343f92cb06956af614acf95711897d55860a4d6238adac19f7d71fd3d07e61f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de43aa54-94d4-4876-ac46-ee9ff91498c1.json and https://artists.proofprofile.net/proofs/artist/de43aa54-94d4-4876-ac46-ee9ff91498c1.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 0x8214dfa5a69273369f776e99aedaf37d2659bfc9f4502748cb270da0e57adf98. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/SEXXC0800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde472dae3b3afa25a1339afc5c1e1aa9847b3935857fa2bc815c193f10a20b29. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/SEXXC0800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f99351262cfa7203da54d6fb0f523d02a61f4b66601b9986d2410d2cf80bba. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:49:33Z), 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/SEXXC0900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de42a17adf2dad911740e53a4e21a3637d2134285ec40c05290e3e7373d4975. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SEXXC0900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fba17237f440baf2f5e48e381086d645c981e6759fecd500fa870edc27e52f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SEXXC0900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f022f961a7c925e7a77abb22927271da59b9aaea571c4de6f20ec07e38d5625. 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/SEXXC1000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d51e31d7c3996d5d7d539aba800c7998932b9e8efc7ff52432086dc9c9361d. 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/SEXXC1000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece4667020be410519b7130b282f2d307e0f22258165dc439ec5832aedc889f8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEXXC1000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354b93b3ec8edbf11d12eec38fc650d348662ccf162fe125ed454e69aca83996. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEXXC1000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca73e6de3bece705875770cd83411a55cac143f352848917f166d764fb1fbc6. 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/SEXXC1000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e20346e341b37a278c2f7547f3f3f5339457a9afc6632b13328467e5dedbbc. 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/SEXXC1000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fa7fe95eeb86113388d49434f618aa908e6ae952c7aab11bad3d28284a5f8a. 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/SEXXC1000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bcea520f2c38f50ddcf94a2354ea90e5cb42db1b0ff9fdf72731f78364acce. 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/SEXXC1000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a0945176db7bc0afcadf0e3d97ea616438cca5a9a8215f54ecaaaceb03aaa7. 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/SEXXC1000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd59890a43fc3a13d860c1b66dbcb2f07121da4f90ebdae9e12b9933971a627. 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/SEXXC1000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf2705e9ac5bdbe4e1a4b219d86d971960b83baf4e4cdbf396cef4e9d6891d8. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:52:35Z), 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/USVKM1100001.
Love Will Overcome (feat. Jackiem Joyner)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6336160bd87ce5f064c343c6e2a52fc9870f02b7ca89369b3fa0d5b60fb6a7be. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/SEXXC1200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d196f30b9dfd2a4c601d13275c4b3a2cc99947fc2c8152c609dd10ba16e76e. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:20:24Z), 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/SEXXC1200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d00453cf12adc4fc22cd3ebc6e04ed6e36479be2dddfdf2762a646fd94722f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SEXXC1200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249b65e2c27b425048228f8dea774a1663c3e03d3047b18f9f0caf7d1a6a6e92. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SEXXC1500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d5e34b0dad1ad0c640000795a29497e9db0621c67861732d270de4b6e5aa8a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SEXXC1500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b0a610972a63a73f5bc356e99d8d99c80b00f9ab2f1c6d717aefe9d694baa6. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SEXXC1500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ac4a08cf2c15326e377a8fd336bbd0eb5f4c0fd068944970efe262c419f20e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/SEXXC1500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229f93a10bab9439e3e8f062f0654f2e0114854a905940d75726c23417733c18. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:39:53Z), 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/SEXXC1700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024031ced5cf0d1807ae6f0242e6c744fcc37928ea8a004b8de881d311c7ee65. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SEXXC1700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26eebeb5d89ad51c458815fd561dbf44232d478c64a4a1b39b320a5adcee4f16. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:34:40Z), 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/SEXXC2100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db64e3bb5625a2871e22f3ab29a6999eb4b21957982e540c82660c91a1e601e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SEXXC2100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1a3500bd51a397a9ba882d90c6d792d68f1bc694f4cbc779039010ebe24b97. 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/SEXXC2100204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74057202854d006d66c1e41d6f3af3c1acb7a37ed394b0fda7779314d6e9adf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SEXXC2100206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150ad3001f42720ba6848882950d0114fb299cd25e0489f477300590a86a12a0. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:22:00Z), 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/SEXXC2100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da5302f1dc3f5376da285cc1604aec494a33e0f0ecb9c8eaaa4e7cd498589b5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:48:40Z), 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/SEXXC2100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc286500416837182bc4bae3bde8312dc994a361def4d741b3b91694ef25b3b7f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:01:14Z), 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/SEXXC2100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc1089548bed7c8a5d3cff4c6d98ca26e0d63ae06a5c1f9f345f8a55e1ac409. 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/SEXXC2100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961ddeb7ead483e911d41f83e7b71e76ca80207b215d3e3d6914f4198cb48ee7. 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/QZWDE2337404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c5b2fb8030c43efd0a20f3d087765c2ad445ffd1fe03943d9582a8ba16f467. 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/TCAGK2261480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadcf1a600ae5c6a2565cda8e0fcf5aac2ed2018dd09b18d18494810bd51fb97. 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/JPZ922200649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18ba6689f77af00ebea1d09112b2561e22f0c9596b23db0e07c80a65dbdd6b1. 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/USDY41560619.
The Whale (feat. Jonathan Fritzén & Jonas Wall)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6e562a69d3718374f825a5c8d1d00a9a7ee5953eda3cca5f0eaf8091a6953e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SE4ZM1500102.
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