Anton Westerlin Kjeldsen (born 16December 1994) is a Danish record producer and songwriter. As a producer, he helped create several top25 songs in the Danish charts, for which he was nominated for sev
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 0xe6ecd59904f0a8f2aefcc893ff8e0af4c88a1cb61adae66da4c6b0711abdc1f6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d25e2e7-de3f-4540-962b-679bff79e302.json and https://artists.proofprofile.net/proofs/artist/4d25e2e7-de3f-4540-962b-679bff79e302.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 0x1c698ed73d2964b5ccbf8e5f94b93149ff14e7e395112beb7355280c465c5fb4. 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/DK2DY2400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927932c0d2e4c47f6429a5881501f089da6ebae64d47fc6fa0abb29ce3bd7d32. 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/DKUM72500211.
Hvad Er Stemningen? (feat. MAS, Kundo & ozzy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b4a23d104b438be76b861b49bc0ffeac71a47a4473b032859514b1d4b6b138. 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/DKUM72500212.
Handsome (feat. Benjamin Hav, JOSVA & Gilli)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1471663502130f359f5d80d774d37b1f99744631cb181e75f7db4c80ca582f74. 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/DKUM72500206.
Byens Hold (feat. Noah Carter, KESI & Lamin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4591f86a42b6af096ddb0b407ef6b743f7298084bfa58071c9740321651f291. 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/DKUM72500213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2138da34f2d07fd87a5818038846f8a88c37ef0072f936a91b4f332ae3da3d7e. 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/DKUM72500214.
Hørt Det Før (feat. Pil, Annika, Mille & Medina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76b2398e3e57a36c131b842341b085e9941ba59d4457e0c825d4cbec1da7f55. 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/DKUM72500215.
Hvor Skal Vi Hen? (feat. MAS, DJ Ary & Sivas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb258849df1338879481f622185f142034c80caf46ee2ea94d79a60f4742a45fa. 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/DKUM72500216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7290de92c795775b7cd1f2c997dfbf5e072c9d1f3d8a7b7814f330d4ed5e79e3. 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/DKUM72500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe75d5d1aea45905c0bb69a126039e50575544ffc12f1c2dfc5a2b2700c5c06. 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/DKUM72500217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78eb27eda62b3a91fbc7cdf217aeee43b23ae838d06872a37bec1696b71551dc. 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/DKUM72500218.
Din Energi (feat. August Høyen, Artigeardit & Bette)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6f26b2cf1f6b303c0ed4118ea597acbc9a041c1a353498e3b928c7d738b9d8. 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/DKUM72500219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789a45907237c3efc05144389549a36a99a8616f9bf26e9d4786e4dc78928215. 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/DKUM72500220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd467165a740b2350f592be198510f11577314fe4628aea790f58e66fc977b30d. 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/DKUM72500079.
Lidt Luv (feat. andreas odbjerg, Artigeardit & Lea Romea)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae8e75002f3f40941fd30c7f51bf4240992737d458841232882e2b9f5eea77e. 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/DKUM72500222.
Før Du Går (feat. Sira Jovina & Noah Carter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6701e4921ff100cf14eb2c86452a36087c72f6a1ca31e38345e3197f44fc4f95. 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/DKUM72500223.