Kryštof is a Czech name, equivalent to English Christopher. Notable people with this name include: Jan Kryštof Liška (–1712), Czech painter Kryštof Josef Hollandt (–1713), Moravian lawyer and profess
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 0x69474139cb22662cfad9c7236090115c4062b5e924c2ca4f069823dd67026eab. 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/decc2a76-0bef-4449-b1b5-e7010f8fd360.json and https://artists.proofprofile.net/proofs/artist/decc2a76-0bef-4449-b1b5-e7010f8fd360.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 0x0baae61b752f39fd9933e26e4666477824af58f327b9c4fe6a8d9d361b345e25. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/CZA230100123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5104f9c505dba002cf0d06933c5f2949f6dd7a5c7a3855af6076abe7acc9f64b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CZA230100124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035d14a2499196a401906207ec46705e61953a6cbcaaa3e35c21fcfe7616fa35. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CZA230200346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb730574b21e6c6b12211ffb9369c19f520acc1fec56c8a988f9789a9d94e2f4a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/CZA230400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c36a7f5b0d90063071d93c7a633d9b4be4c5a0c2009279867f0fec0ca9a0712. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/CZA230600261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bea28242248cf948f7d88c0380457797d4bf00c70c7ce66e747a64c8a3e8f33. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CZA230700280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d2baae15473bfd72b68ae5237cf272bf7760c01f771d3c309e7860cf3a3405. 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/CZA230600259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd8953e9ff90dee7d53e5a6108e1537b2d1cfc2cb837d413ed3646a1eee1ef0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CZA230800463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c391f44120442caa74dd21acccf869fd794088966a7b00431cbba7c402a7704. 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/CZA230900675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29818ce7fa0d04c0bfe4c67de8750a53487a1414867b20ba73bfbc6490068280. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CZA230901099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762faba29f9e5ab7a1414742a74efe5b038b512c455d7d47917352fce2cff32e. 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/CZA230901100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677f0b3b6d6334fcd46ef287a0f87b1b5e7001f1ef4770bc9e49706a7a18f1e6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZA230901102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bc8effba5c9763ae5d12815b6c110b35f451636b09989488c774457e40c928. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZA230901107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12af7dad5ea4224908d54180220bc5fecdd9d8b330119fcbda629815d14165c7. 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/CZUM71200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3f915886f14ad44d0379d5fff3691fd210ebaeb04f41fcfc4906be0925305c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CZUM71200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f15b3c7f8d7bf0dc0d8e81a79ef25dc1f9093a981b3dfa8c145a45b7d154ea. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/CZUM71200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f0654c97257c2f93892ac4fe9dd2244822463d769a0e280e1ecfd1bcc5bf92. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/CZUM71200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a29e799583bcb74320189cef8f94d2bbda4df40f4ab466da64aebe1843de10. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/CZA231100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e14302f2df20cc29cb8c9be1d47b1fc4df59e8a525dd1e89833806fd4eae69. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZA231100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe79bbf5cbaa03aa56fe4427bc0c50100e15464c8ae1c77cfb3fb653c5fd8b47. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CZH011200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda652ad8faec202bdd31058ace83118210c2cc5d279878c93265cb5436288a6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZA230200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bc8effba5c9763ae5d12815b6c110b35f451636b09989488c774457e40c928. 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/CZA230901107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90edc802a4de220df73225f5656cdaa5421d5d8fe791a179566f2cc4cadf5e6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZUM71500167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde46e0044808feaf1224d819401727fdc4cc66bcf18f1816ca9924d38b6319e3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CZUM71500169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1365ac203c928d2748adae1b5d162dfde722f59dfa5eb49e891cb39607b8c9. 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/CZUM71500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68283ecfe8fe0e80490ba4a617471335f695e0196c0ed64366e03b3a6a1cb25f. 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/CZUM71500171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb173eae5148735dda54824a7d562aeb1c76944e94650685656d12ca57cb7075. 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/CZA230100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda652ad8faec202bdd31058ace83118210c2cc5d279878c93265cb5436288a6. 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/CZA230200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad795896be4987eb42b95859e726cd4353fbe91576bba99d650f96515eb466e7. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/CZA230400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d2baae15473bfd72b68ae5237cf272bf7760c01f771d3c309e7860cf3a3405. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CZA230600259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d437975d947db65f0524d4157816daa86904ae1d3557158dd0a7675d558275. 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/CZUM71500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d79455e008206d425e8bbe6f468c8ad8bf44198b50b1bc3c62a81b28797e45d. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/CZUM71500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956a305a0334b849268890d63ec5e98c135ddb18deb54b34d1d137c41295fcbe. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CZUM71500172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553216ea6d291e53d93b0b0e977a61959742b57ea6c595718a8885048742b582. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CZUM71800560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2834c1a1b7b79a9360b4babd1691dfcf1510db6c8ce95f8de0fdec7a99fb06. 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/CZUM71800562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5420bbf5db44f2ae96685e95ceec582d6fe25b2ebf4eb7d7d39494752c6efb. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/CZUM72100484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70f0b99946eef6b4b068a9917ebffbf4430c00a52f5cf430dbd854306cc37c4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CZUM72100487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926133dfe6b164ab427d5902dc67ebfa43a39f56004908c681a3cbbf7c4493c8. 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/CZA231200364.