Klangkarussell (German: Sound Carousel) is an Austrian electronic music duo formed in 2011. The two members of the group are Tobias Rieser and Adrian Held. Their biggest hit to date is "Sonnentanz", w
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 0xa181f888ae4f07834422d6b11a21b380f99033692e06eb296c8ee9b662361df3. 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/06759328-0d3d-47a4-a8b3-f677bbf8372b.json and https://artists.proofprofile.net/proofs/artist/06759328-0d3d-47a4-a8b3-f677bbf8372b.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 0x24bc9bd6cfe71fb4b7c49f7b72eb6e874f37f3bad883b7be97efe3c9a48ede1f. 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/ATFH82300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdaec70345b362d50423ed261e587e8205661e26afea933aa469a9964eb1ef8. 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/ATFH82200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdaec70345b362d50423ed261e587e8205661e26afea933aa469a9964eb1ef8. 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/ATFH82200701.
Whatever (with Ava Max) - Klangkarussell Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e733f5bb14b5e24a8361a17ab282c3e1c70922faa7e27cd8ebcb3db6510b39. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USRC12400930.
Sonnentanz - Sun Don't Shine / ELIASDASS Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b664626c9040f4cc0137feb4f9f6801f616ec9d4b9eb0c079c76ae95893270. 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/DEUM72300692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa563649d423ea8fc6d2e980cec5c253c641bab5c69b0e759bc05436b4b14cf4b. 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/DEUM71710056.
Slow Down (feat. ROBB) - Klangkarussell Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1830b9a5253b455133b52eb3cc9cdadd894c6ad0aff7d686babc3b324f2f031a. 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/GB5KW1800409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307cc7c8f4f7edf9d1eba62adf3af67e333273791ab5e3efa7a4282bdf764f04. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEUM71501923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bfeb52ec6702c74010911fb65fcbd1d2ecd1a607cef5dae9f7d8f39d6734e6. 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/DECE72402595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ec8f4cdc2bcab4375abd3d2e9750e3f1598a4c93f3095d79b9d7e16fecf51c. 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/DEUM72411412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b664626c9040f4cc0137feb4f9f6801f616ec9d4b9eb0c079c76ae95893270. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEUM72300692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb71ef5f3f3d6b63db89def3a2e2856993072bc409e7df9d0a20fe5e5dde955. 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/ATFH82200606.
I Feel Fine (Möwe Remix) - Extended [Instrumental]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c2509666123f0db4c928c09c99b12e8f0fd038bc8166956d51c9fc944773be. 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/ATFH82200608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6eb494d37ee8d7cabe76196a3477124524851b339284084e075ddb281638a6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ATFH82200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e8d2ad152a1b2bc1067a04bd2f6652a4664bf9769aed24b46b16beecb3b23f. 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/ATFH82200202.