Dalibor Janda (born 21 March 1953) is a Czech pop and rock singer, lyricist, and composer, whose popularity peaked in the 1980s. Between 1986 and 1988, he won the Zlatý slavík award three years in a r
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 0x64054272804925ab093645385b28791971cd7656b22f486142b6e63528c0d73f. 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/077b47d4-607f-4850-9f1c-28568e0436ff.json and https://artists.proofprofile.net/proofs/artist/077b47d4-607f-4850-9f1c-28568e0436ff.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 0xf290e3c6e31f035e02c9fa86adcf48c2a059e7753d2e6f319174d0b4460e5f1c. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/CZA168514999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31de1f59837455fa9771a8c3889722ae35e49a2e4cdd7b026087c90e30c44c3f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/CZA168507999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8680954a1b46abd2ad5870249f4ab97e7823718ef62f0330093bba044fdfccc3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CZA168702999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c66d1a98e4802f4582f61060d18b85a4d41bc7dc0c490b42845fa6b9092d3ea. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CZA168750998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fe16e8be1cdf4923628209e0e5abc15a242b1343c2184063ecbef354e03176. 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/CZA168699999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499a4fcebf2f7a2b61e4813393bba3aa4d70bca4fcac59d4238d98bdb8309427. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/CZA168800946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3844c9dbae91fc9f53963a2aa225277c12eeac10131f2e45b58200e077ac85. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CZA168800209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219666241a53ae19816fcb6b5287d6328bdaaec824f8e0087f1c4bf4503ec696. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CZA168800315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9a4015241d295183d40bc4096a0a90e6f3f55a37259fe4b7f2510143426bd1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/CZF761800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90356466bbc4bb0981dda652f892407bcc61d849b18e40519e273096bb54f33d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/CZF761800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c0ebab2004e83ff6abc69f44746a0a968713ee2fbff6ece708c7c4a6d9af60. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/CZF761600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935f931241352d611f168080f736eca7ba37c374e4835cf2e4fbe9228a182d95. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/CZA163358093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e72bc73db248f21e2fc41a0b26aa43a52326a1eacbdd6e873330fc59adfe11f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/CZF762100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cdf0d8057bb090ffad56bb91b195086c1d3b654428c8d39f14430d64a450dd. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/CZF762100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb23f42c91fd4bc2983b5d13ade772458b45590e8c649977ed3e7f1b2d3ff3b9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CZF762100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146c9e3498d2dee0873261dfb76f6a8ab71548df4c77e726f07d59e259502cd6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CZF762100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb981edfe042940a71d322c8e6723271f886c48592a5a910db7a892a2f2291b2c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CZF762100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e544652b4d9680fae95477b2a2367b6caeedfa69610eb32981a57e502c8268. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CZF762100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94f440b86f4d9276f35a33be66d590fd555fa9b505a86c70fc1ee3d7b4b1efc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CZF762100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c1aac7d81ac04164c1d0d61b7f187671ec9c8e356b53c0c5e802d11246b1f0. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CZF762100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3118e4ba4c3a0f67b580ed57988388408d0c4e613239c9ca1a18c8d39b5454fd. 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/CZA168700207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f43934313d898edea840c3ad0f7109a3432d6924e69bd453d5dede6bdfdd11. 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/CZA168511999.
Svoboda: Originální Nahrávky '65 (Výběr)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171c5c9115807eaefc5349aad3013e70d7ddd4f4e38e81853ae91b1cac69de63. 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/CZA169000990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8190a9235cff5c1717c4218f51f9d6ea4f174056f9b78f90098463f53b90b67d. 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/CZA168400471.
Děčínská kotva Supraphon, Vol. 5 (1983-1985)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dabf054353b3fdf6f85ba4349b9892723bbab396acbc010ca06aef56f3e1ac. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CZA168427996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe0b61856b5ed0eb8bc52733798a27d9b46a61c88c2cc68247842d44f17ad21. 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/CZA168500578.
Lodí Bílou (20 Let Písničkového Festivalu Děčínská Kotva)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140f82e1f39f9cf4856bbb14480f218e89856202189f6a841fb33128559b606b. 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/CZA168594994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f614d05f179696e87c3e3ae37824dc78da2fd591d52d9e18826866a3d9ffc5f. 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/CZA168800079.