1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xcc3ce82c883a0e89d27fde605dc89b59a8a01dbd962c6ad684e79f64812de67f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0bef9b5-529c-4f1e-be25-d1bbf738b547.json and https://artists.proofprofile.net/proofs/artist/f0bef9b5-529c-4f1e-be25-d1bbf738b547.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 → block OTSBitcoinBlock must exist at that height 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 0x72df214c105f56f0dca3b2d4c3013ffb609775e4fa1e3e60324d67009a0f764f. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/CZA659650997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f5f836aa4fe634834945852e6e44996630b04c80f09038f6a28f77eac16642. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CZA659851219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c2cb4ba7ac1adeff6c87a437a6e471b633c6a9e043cc1e76b249f3d62a3f45. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CZA659851222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd7be6a6fefbe11dc5fe5538a2cc3cf2c44f1709183f65f98cd97a869c8bd50. 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/CZA659851228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b4361e16cb9b9db25a605fddf8afe39b74193600da58cf82a9c06fd89c02d4. 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/CZA659851229.
Herecké Začátky Svatopluka Beneše - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d59ff04f5676e6e1fe4ef9c492704a0c335d85fa0e827deef39eaf8902d745b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CZA650602450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf050e6a4670b625daf2bd227370fb30e7a17ffefec11adca01302df82ee2383. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:21Z), 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/CZA650602451.
Zita Kabátová A Její Herečtí Partneři - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9760a4717b258df7d913e7acc76e3118bdaf1d8c22376ff5ce9450254ec19b2d. 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/CZA650602452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c02f146f4387d0bce30902c899933f237890ddb31d1f2142028350d986f6f95. 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/CZA650602456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56fb25a085a31c4496be2a4cea85a039a86e09506749332272e6dc27fe92561. 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/CZA650602459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45946e8f5cfc3b55ccb5fb09683964568fea444390fb059577e5952bc7926c2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:18Z), 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/CZA650602462.
...Na kus řeči (Live) (feat. Zita Kabátová, Svatopluk Beneš)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2a79f9b9ee950b6648a105c9d1ff030e9d1fa87baa5979ad049c85e2d7acf7. 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/CZA160411368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8305cd1f22cf0f1d285ae6809613a581cfa42debfe1caf57638cfaac24d50f33. 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/CZA160411369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0841f7ad19cb3d9739b2959d1cbd66e1edae35221469267025e94e01863a950. 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/CZA160411370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f9ec06de8618c62b9ea3b7cc4dce699d34ea07a95621cf691c1d3eab02c3fc. 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/CZA160411371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9ec27d14d21ffc45669db6421e729fd5b8fd825d0cadfd25a72e4d0a8f69ba. 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/CZA160411372.