Birthe Kjær (born 1 September 1948) is a Danish singer. She finished second at the Dansk Melodi Grand Prix in 1980, 1986 and 1987, before winning in 1989, and went on to finish third at the 1989 Eurov
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 0x53baea406866debc6397a62bde70cfa778560aa3d74dc3b91fa8ecd01c2d6de5. 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/febb4aee-1455-4a78-9a2a-2d26c97c3ac4.json and https://artists.proofprofile.net/proofs/artist/febb4aee-1455-4a78-9a2a-2d26c97c3ac4.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 0x4d1a05420c4d941d00a10173ece9ba07ea0253dd6ea1acd896663edd2828654c. 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/DKADG1500499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304c80a86ecd3e0878f3cb4f0422598b5144681917ef784f55de00c6e4f469e0. 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/DKADG1500500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992c9cf347e92ebb0114c3df9916fccb7b6218578c1fd04e58045e26536f20c2. 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/DKADG1500502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fccb9b3ecf20b92c25ac3cccc2724173a1d6bb16805a18796c6eaf6cd072bd. 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/DKADG1500505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d430d1dc4b65c86adbafe31be69e94d730e444e90626c16eaf3e91dff2d0381. 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/DKADG1500510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0935bddf36c1e9818f3c7c4c43176e2bd0dfb3912d9596c035d665648279cb60. 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/DKFVA0300502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9714eb90014db6a9e1ad67b9fa1670734ee04d04ce0845186d32948f913c08f2. 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/DKFVA0300503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d3020dd25061f4290001af8905f01eeb591243be04d4aac2ade8a1a9f9ce10. 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/DKFVA0300506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47025d77df511c1a9af1952a4ed29dbfb3e4dd68e7a059a6a286efeb673e6db3. 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/DKFVA0300508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1b67f110b765a2ed6cadb4b1fb39af56a174bb84b6d1c8c787848445a1ef11. 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/DKFVA0300512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21c2589c7c28b9c3f03a9f4f36ebc1503b7e89b077bdcea25fcbea9c432889f. 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/DKFVB0100601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268d71ac919268116dee120b05ffa1f5ce6aa41410bf2248be7ecb53ca7df59a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DKFVB0100602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3479758ebf2f75d65b56600fbd0a5e053924a7ad58cdbcc3b4b336beed87e8ff. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DKFVB0100604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7341b5c9163947694048a894ad67521c9266b233f3233a4ecbe4901f28655a. 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/DKABA1300376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac791b6b9af910524fd49ea117c3c41a6bc9ed51e5bcaca4561d0a7c3e8a218. 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/DKABA1102384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cc6da845c678bd54218ae2846f2f97de8c9977dcb54490fe914f382c670713. 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/DKABA1102391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251ec4563c35ee4f63985bbf2146536f427e7fdeb7edcea55800be5322fafc31. 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/DKABA0601139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69161feabbbdc041a291eaed777082fe47cae0e9223c19449005451f6a4aa2c8. 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/DKABA1000905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9434dab7e3389faf41412e34549f5fc8715e1649b188e36fd321408d8ce956e. 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/DKABA1000911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa2f20b9c60969a798343097e8b5143ed647a33124f80b8d657f7a4a5d664e7. 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/DKBV70703006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdbbd764624125f316ad20b13648ac85bebcb98fb9f11468abc84c147f26965. 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/DKBV70703010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc5241da5180e3b1fea7426cdf53fd13552fb336726def1cd4fd19d9f05c239. 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/DKANE8317107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290a6c601b35677bd8345cef56ebbdbd4a69e71791bac5d43c3524e904e0869c. 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/DKUM70500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcc32b477be7c97d8054e656b4787cd06dfdcc131c696dce29ac55ddacf6dea. 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/DKBKA0400731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1101762112ad3ea515c7f9970b2bd3ca033848e313b517e360be2ba3cf68c7f3. 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/DKUM70500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd93f0fe8f84169f3d4b426ee3a6c1efd07a23159091f2ab28f8b2cb28553746. 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/DKUM70500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39731cf9f59b3b29ef33a5a500c28c858922123a4a06ba79efa53d12c2fc95a6. 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/DKUM70500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5624b4b508841aef54807fc65556d70a9af61eeb470f016967c3ac4856af0cbf. 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/DKBKA0400682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde27e2544d4a2ff6e22362b4a11307df9cb48add5c2ff4349d530b706de0d005. 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/DKUM70500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1b29b9dfed2465c1cbc1619019892f09f2cff141122180a131710c98098b6e. 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/DKUM70500132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9d24907e86d748d9303cd5c1a2375905cba94a02e32d9bfad61c67606eab35. 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/DKUM70500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf108f0d33295beff493b74b9603e1053a59effad923e15ce9f59ffeba6ef0da. 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/DKBR22201101.