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
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
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 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/DKASA9809401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6d8b894248d7ce02b30e2ea9b8c10cfc866d96129708e84ba5a98cff8a9698. 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/DKASA9809402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c025fdf9b19ec924e34649b55132a34db2584e8c2fbe33094ae9c2cf20e907. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/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 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 956351 (2026-07-02T11:38:34Z), 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 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 957145 (2026-07-08T08:56:20Z), 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/DKBV78800108.
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 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 0xbc37380041ddc02cf884653e37b260f285310308e451896006259226a4d3962c. 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/DKASA9809413.
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 0xfb1564633ae998dfe48097740058a68f52696a8eb51bfcaa1edcf7d518c97d0b. 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/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 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/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 956351 (2026-07-02T11:38:34Z), 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 956349 (2026-07-02T11:34:59Z), 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/DKABA9759006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290179d6d6ca32e224018bf1ca98697ae20b4b03e54cc49c4672976bcf082fed. 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/DKC991600510.