Karl William (born c. 1995) is a Danish alternative music singer and songwriter who is signed to the Danish ArtPeople label. He caught attention with "Kostumeramt" as part of the Aarhus-based Hukaos
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 0xb997e7c4b1a61c554094039a25d4035a73e55eee315a630bbb7d3db9834ffea6. 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/bbdf38a7-4891-40e9-9d6e-7d095affd27b.json and https://artists.proofprofile.net/proofs/artist/bbdf38a7-4891-40e9-9d6e-7d095affd27b.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 0xce4a399e066b8c8076a2e0adb62fd800c3c646c29372c08d1734308a27d29473. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DK92S1401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2544bd46abe877bba76c56d6b97e8f45fc35376bc905673f36918bdd24b4f757. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/DK92A1401805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07131ae35a6fe9378f107d506ac68f9718b142694fe0593e772b164a54534c2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DK92S1500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c515729a9085a1cf47c3584d59249b6fda7611eb2da9ee97e9d5a10aed272ea. 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/DK92S1500405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dcfc0f725ad844e0a992e33b2910b1a7244bb31c1ff1abdecf06cf80a1a51d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/DKADG1600231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87018f453ba9d5974c252e11622ccb96f3ebedf6ee0f20117eed5776f7397338. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DKADG1600234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3269dc589fb96753634d4b22468dfe63a9ece2d85f0dc0ec15919bed07df269e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:19:12Z), 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/DKADG1700273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f5372a00463704225c1e7d6ebc6791456fc8fa33fa74c48320efa931c99991. 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/DKADG1800148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae23631df2c66dc7fbfbd66ad4ad8c17075ad45127e28a235ac73e623aca167. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DKADG1800341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27b101a012fb346caa5ce027e812e8ef2a18a4b3d9b2f81ebedd03a12659a81. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:29:01Z), 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/DKADG2000488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950eeaffbf48036ac5d587a3b59b87b32133c8b2b218259bca78f49ffabd9205. 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/DKADG2001093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727e8b463fd0ca4bdd92df036f359cb5155ca674db6161620685a2e1edeec92e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DKADG2100313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c4301bc24a2b7f1eef2f082554814b8eb34df08997a00e80ad195110341de0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:19:28Z), 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/DKADG2101063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663aed3fa2ae8dd5017f9970614b60772c8979d8aba4fc1a022c4c6bcf4b6870. 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/DKADG2101064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83403dfabea137b57b9b46de864d602d1327fc627c3d39f57f58fee8920b0cb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DKADG2101066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdb698a0a4c35577079961ad4662cc09e9c8887be6200704cbacb56d5719be4. 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/DKADG2101067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950eeaffbf48036ac5d587a3b59b87b32133c8b2b218259bca78f49ffabd9205. 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/DKADG2001093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66abe99497fdbeb0121af6b5e31d266791e3487da97728688182a7084306c38. 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/DKADG2101068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682170ba0756a3d9621f86de6828d265b713859f374a8aab0f2645d84cb7c7e5. 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/DKADG2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe61472deb5e007bee079f940aa2dabe52ef6ece54ea8b00b43cfe5736f9e7cc. 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/DKADG2200434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa961f925f92285410ead33a4bf158babc066e6055f5960e1249bbccbef181edf. 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/DKADG2400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3db1e9e0056f1a46f5f1702bd3a58bbb03eda232b0af748f403ce5cbc5fedf. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DKADG2400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193cce262f19d0fc964e08b764be326b010f078e73d6e342223efd1fb5f427e6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DKADG2400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb6bcd58403c92596bc85109ecfe483ffa726cedc2cf92912068a8f16bb8c82. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:26:44Z), 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/DKADG2400348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d40dc08f3e8f7d2c694f6fe9122f572dd909388a905767ac1deb87bf4242746. 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/DKADG2400349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5c26938e2878cba2d5d2cff83031a54b410e3e4a5d15a74579fae8e80306e4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DKADG2400350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d39d9075c7d5b9471e464cd8cf5e3bae933cab0a0b8c7817596741d3e5352f4. 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/NOXPR2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64c6fea09c5591d307a37d3cd03403a3c49b58eb152d430be3a80c0b66cca14. 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/DKADG2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64c6fea09c5591d307a37d3cd03403a3c49b58eb152d430be3a80c0b66cca14. 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/DKADG2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dc777451e6eda80caa0d20132d6a8df9ca5b9b3cc77c5a6ef45685520ea379. 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/DKUM72100356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31742e0dcc8d744d1034fda9df1efd1f6649bab9ca6b88f9066f3986714b9bbf. 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/DKADG1700362.
Toppen Af Poppen 2017 synger Michael Falch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1eae530468ec1f2e9930de2aaf5e3013efeec87620d302e7c66579c377476ae. 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/DKADG1700347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2625fa70829449c54e530a519dffbdd0c47d1e97cd68174fbc3249c8b473778e. 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/DKADG1700350.