Sven Fredrik Johannes Sixten (born 21 October 1962) is a Swedish composer, cathedral organist and conductor. Sixten was born in Skövde, Sweden. He earned his Bachelor of Arts (1986) at the Royal Colle
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 0x122ed3809cb1b535bb88e22b341d2281b195826d95ace3f22d2e0604de7e575d. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee39eeed-4e7e-4411-9596-6ab02edc45f6.json and https://artists.proofprofile.net/proofs/artist/ee39eeed-4e7e-4411-9596-6ab02edc45f6.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 0x2cfbb9765b98d40b0667e140cffc08709e8869687dc7dd5f696e3e690b5ea060. 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/NOEHX2122020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60605105c5b143e1748f3fcb5b898bbcd8bbdbcca28987674a6830b4be34c9f3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SEAGA0027020.
Thomanerchor Leipzig: Weihnachtsliederabend
Fredrik Sixten: Ett svenskt juloratorium
Med Lust Och Fagring Stor - Sommarens Sanger Och Psalmer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefeab80663224c479e55ca72cf795a50dd7fe175c75f67a3200a1395d1079be. 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/HKI199269301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba8648d877d9554abc2714e77ca296a920480a20dceb0855ae91eefa2bc9e26. 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/HKI199269303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7a9a03d1e171784e85b69764dbfb9157d717eb50da1c3f5b87663f619aaf3e. 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/HKI199269318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4700dd416d6bc08a87dcb6344075deebebdb8612fdf2b04ba8a90923658681cc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/HKI199269320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571bcbc9bfb8ce83d0425c203eb1b3a77d6031973cd8157651720c729b5d9f78. 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/HKI199269322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eaa24c9b98bfc83426c7adf6dc9e6803d6bdcc727a0394b1830e5cfca81948d. 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/HKI199269324.
Peaceful Choir - New Sound of Choral Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e711ebf21fb704e374d24d9e5f6919851c36fab3246b227caf053d01a66e56. 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/DEE862000685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe313d997187e557698f3a807d2335b5bdb98e14439d89124dde48afd7c81c992. 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/DEE862000686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e85681d5b6fa881169dbdf08e698dcb2fc517dbdad62267ac980482e25440c7. 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/DEE862000687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c39fdcca1465697f6df980ea8ff2b0fc86b54b09eae53ded374ab3fae733b45. 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/DEE862000688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6998f5bac17191bea6b1fa703f62702385d259eb36f9f3f1b4c94f954ee1bf34. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:32:44Z), 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/DEE862000689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9736dbe6de72df373c6aba2093b47a0ae7ba9d55e0aad3ee50ea7157d6106f. 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/DEE862000691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3c27d492ce1223b8ef96182f5d79304ba117b01a7b8dc533f7f2e1465d2a31. 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/DEE862000692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbf47f41b6c48188e40805bb7949f6455a3c41d3ee50b3a18fa0942c7fe4ab3. 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/DEE862000694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b88a7ac64a9399f06cd628e031ef41f0e0543af4b140b11923138ddf9697b4. 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/DEE862000696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0880394e58c8886cdb4e0b237126925226ddeb67c1913567fd2d9cada8d75b2. 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/DEE862000703.
Peaceful Choir - New Sound of Choral Music (360° / 8D Binaural Version)
Dream 1, Pt. 1 - 360° / 8D Binaural Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2483905d34cf681517db9c51b760b161144185cfd82de278007b89c7051aca. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/DEE862002541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd5e8cd840232e76af5465a5d2e106ced6c14d9c0a81ec3769860a173f82937. 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/SEVWU1600815.
Bruremarsj fra Valsøyfjord (Arr. G. Pedersen & H. Sommerro for Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613bdf23f67b099f15a553df089c915c380723403a107bb47a717822e9c5ad0c. 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/SEVWU1600818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459ab75fb154ea01d2906e573f09f0d88f3b7560a3ac76f0af35ee0ae9daccbc. 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/SEWZV2000115.
Choir - Peaceful - Music / relajante música coral
Palimpsest: New Works From Old For Saxophone and Choir
2019 Texas Music Educators Association (TMEA): University of Texas at Arlington A Cappella Choir [Live]
Nordic Journey, Vol. 11: Nordic Anthology
Nordic Journey, Vol. 9: Music from Sweden
Stockholm Gosskör - Live in Gustaf Vasa Church, in the Stockholm Concert Hall and in Italy