Bjørn Tidmand (born 24 January 1940 in Copenhagen) is a Danish singer, best known for his participation in the 1964 Eurovision Song Contest. After being a member of the Copenhagen Boys Choir as a chi
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 0xcceecb625ad29fbfe449888f79b94c0d340e5b49d29c8445bfeb6cf2ed7a1d4e. 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/774a5918-1340-4f29-bab5-97fa11801781.json and https://artists.proofprofile.net/proofs/artist/774a5918-1340-4f29-bab5-97fa11801781.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 0x9eee57f518d30027acda3f65c59010163130e00f06378e0e1a8ef6888f4d2219. 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/DKABA9759006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49af2117a63e4dbcc01e0826a10453218fce9887351ddf8c5d844d4b3864e86d. 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/DKASA9809401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6d8b894248d7ce02b30e2ea9b8c10cfc866d96129708e84ba5a98cff8a9698. 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/DKASA9809402.
Pigen som bor på landet - 1998 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3f075220e13b1bac2ec8f39a7fecd53a9f67cd753b4523c66dbcff39041aea. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DKABA9759001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c025fdf9b19ec924e34649b55132a34db2584e8c2fbe33094ae9c2cf20e907. 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/DKABA0600324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f5b3fde53da126b515ba4ca2513926b19f6bf03a8cb901df8be0a7e57f93c7. 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/DKABA1103911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fa2f93825df050915a691b1e013c93e6f8706736590077045794845a56da72. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/DKABA1103940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf218278aaf9fd9f8da7ac58842914f802aea847f416e574a279de6445b551140. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DKABA1103942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c7c4bc712faafa9c0ac61d430acf52fceabc9401dc990fb9520bf6766e8642. 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/DKABA1103944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac265d36f0b4cd65355d0a6f0a9be8d064dd8889b7d5f87f0341cb27405fa87. 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/DKABA1103927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57f785921fd336bcde51ed5bda579b144633f9ae7886a75656e4b7ce6c54cf3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DKABA1103946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0d9c9fbd80c024e14c605d7ce9b3188f0fab7649350e7c883827aafc9f6b39. 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/DKABA1103949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6210dcbc42824b2c9bd8bb432d1108dd51904f8485dcf8c2da8ecaf79b0f380. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DKBV78800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaaf81593b208c1b1df7bd0def70df86a2680c097d80fcf428d8235583aa926c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DKBV78600305.
Nu ta'r jeg til Dublin - 1998 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf588e09e368abc9a6d6033db322036b30ddbdab717ef1d3254dbc79f8aecc2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DKABA9759011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6d8b894248d7ce02b30e2ea9b8c10cfc866d96129708e84ba5a98cff8a9698. 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/DKASA9809402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf59180fbec3bb08a1a3cf46749056b1f1b776afb42dbc346dfd4c45e64c83b. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DKASA9809404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc506b9e7d16d1a9f7d41d87ffb6c12938acfbb8efed6c09d9ed3250feba309db. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/DKASA9809406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddf32943622970105065386b61070996bb2d8bf33b08c7e496be14189ae0c03. 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/DKASA9809408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bd7950ba1b2f61a3da8eafaf6aa42d8386fbcf0e6d8d746ed12f7a60566429. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DKASA9809411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc37380041ddc02cf884653e37b260f285310308e451896006259226a4d3962c. 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/DKASA9809413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea30be490aee4586e8e1a9a40788dcda10c4c3e46822fc45dfdb03c2b379de9. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DKBV78500310.
To små røde roser - 1996 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38fef31b879613a9d738ad6c1250252721ec6e76041fd594ab7586562cd08b9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DKABA0700583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd37a581704472ddd8b4cf1d30d244c3adfcfd7cebc97e29ac6ab9adfb8dce8. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DKABA0700594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d2555d062c583f5612d4bed9a9ef1d45d186466446965aaf69d800633a994a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DKBV78600604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0403f67441835c3943b36ee40a3a35bc907133b24430dd42be5fb8efeaaedc6. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DKBV78600605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ba2296fa0a8e44e3d4bb21750936699487959f8be66d353ba5f05ed0a9cbfe. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DKABA1000614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b143c1dc75b677e5d01285d038b6448bab28b2810e0a81e240d6e4c2fba6485. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DKABA1000615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1564633ae998dfe48097740058a68f52696a8eb51bfcaa1edcf7d518c97d0b. 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/DKABA1000616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef64b4ecf4c54193a46a4268ab7e7a21bfa0f1d9500ddfac3cb98d0ae400ec0c. 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/DKABA1000617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c17c1983f839693e1b8e5220d293eb458c1212d31cf44408f432c0e998bd4d. 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/DKABA1000619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbabccb9c30886a13012d83a6bebea8d548a1a227b383c17591ae3c2632233f9. 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/DKABA1000620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284046d4feab3d8839f95b3acb5fb28494367b5e16a5df11f977cf92ca03d36c. 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/DKABA1000622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb267afacbb11725a41a2daeb4db728306b1d0da47262bc23f0c93ba41fa2e5. 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/DKABA1000624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86945b78d8a3f4ce8dd72536f164b0888e4816b35791fcaf8b76be1fad65080a. 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/DKABA1000628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eee57f518d30027acda3f65c59010163130e00f06378e0e1a8ef6888f4d2219. 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/DKABA9759006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794fcc7c04bae92e8c6de838d56800b2e325502eecf81e849202cd3d7ec82441. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DKC991600501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290179d6d6ca32e224018bf1ca98697ae20b4b03e54cc49c4672976bcf082fed. 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/DKC991600510.