Claus Wilhelm Nicolai Dunger is a Swedish singer and acoustic songwriter from Piteå in Sweden. He has released twelve EPs and albums, singing primarily in English, and collaborated notably with Will O
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 0x9cf15f2d57299d36b59315e8d05015ccefbd39c4f94d30dcf3b48951fcf30527. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13871a7e-93b2-44f5-9818-c671c6333813.json and https://artists.proofprofile.net/proofs/artist/13871a7e-93b2-44f5-9818-c671c6333813.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 0x87a2897ca7e6b03594354e3fce5d2a513f4fbc3faf6c31645748a8638a4c7e42. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:25Z), 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/SEVBU9901040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a6810bb966892814ec8ca12df5b9c43179355bac173924675caeb72c56a98a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SEVBU0200096.
Here's My Song, You Can Have It... I Don' Want It Anymore /Yours 4-Ever Nicolai Dunger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5206be57662bac9b931332a6cb5e9311099e8b8be1a58d5fcbab7633afee1ed. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SEAMA0500490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0314a061de1160191de11bc17c2f160c0ddf6baa17a6954529fc65c45ae72314. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USE452400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c8607019a11f389d06b3d053ceb5a915fefb2423e95b87a830cd07b5cede4f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USE452500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb923760079a4262652228b71a066368575e89d279f97e56da97854c838fb67d3. 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/SEAMA0500456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f327e734ea1611391e138e36a20e11fbdb83f03499d9b83f1e5915c28ba046. 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/SE2EV1000110.
Hyss är bra - Emil i Lönneberga (Svenska artister tolkar Georg Riedel och Astrid Lindgren)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653685921d6c426f3a765952e9385ae696cc6eaf123d5795bc88f7ad9b32dbdd. 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/SEUM72300580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4aaf409fd02a2dbe9e3b1bbca67dfa420a4ab59466e29d34151f2267930ad57. 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/SEYNI1200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d77764158e35e8382416be93f55dbb21b306d26599d145c1ead3fc0ae2a6b59. 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/SEVJH1102002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a224645283b7abaa0a607c6654cc6bb7b0539c937198da1901a6024b4138d6. 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/SEVJH1102003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6ce9f791c50b8bf27b1cc76e529684fc5d4249cfdec5062d0ffa19deb9f41f. 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/SEVJH1102001.
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