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 0xa008ea5c922a326f69e95e5dea9447c7c0544d2dd4f9e8a0c94143a57e3c59e4. 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/9670ae99-0ef6-4248-81e2-4bba679b049e.json and https://artists.proofprofile.net/proofs/artist/9670ae99-0ef6-4248-81e2-4bba679b049e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Komu Se Nelení - Tomu Se Ženění & Já Se Mám, Že Je Olda Přítel Můj
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 0xae5c6a010f4c2b163b2b49616bd20216dbd08f13c7c7a3f82d28c4ccaa8bb8be. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CZA168289997.
Komu se nelení - tomu se ženění / Já se mám, že je Olda přítel můj
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dc81f6b95868e265c32418a0492d541669f5abadd55bfb14a323a209b1b703. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CZA161204232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586864c46efecda01c6274fcfd797feb9e0b38031b407f03b7e94ef51b33f2e5. 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/CZA168700071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0612243e040f0947f3f8fb1e481ef96708a0d56b6bb7604f09f603c36a5d16ea. 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/CZA168800593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68da16bd23c94697887a46db265aa1fc248fd75b6bbbc10266a26d8899c7330. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/CZA168800598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8fc760563bd97c77d0ca4102c0d7e3a513a95df21f22124231add8e4808412. 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/CZA168800597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcec444d1f092a334bb5467415fee38553a581ec418f1bb52c23582bd7e73cd. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CZA161300712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b75e775aea096507cccd11abcc040861e2af1a96ab43f9aa9944a50a7ccf8b0. 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/CZA161300713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a008786cdad5f3528ef143f2061565123a2ab2f77567dfb2393e4944f42a13b. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/CZA161300714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255d65449f4e56f038fc3fb6e5782674e1e9ff9876115a990aaa639e41233340. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CZA161300715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc774a396968190b35c21e64360778c485a4b069e0c3dba5208a79c5a06d93633. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CZA161300716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88685f2d16b930502a9bd3832f721135be222a2a2d6b25a425b38f5dab5eb863. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/CZA161300718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7398f3275fe0a7872038abc7582978ac74c4ba847917def57bd5456bcbb62edd. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CZA161300722.
Zubatá - feat. Michael Kocáb, Jiří Hrubeš, Vilém Čok, Klaudius Kryšpín & Pražský výběr
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5537bc98e47b384e4f9f3a8a2264a65f1dd2b74bbba7356d381be779b4e2c74a. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/CZD711600037.
Jó, já se mám, že je Olda přítel můj (feat. Pražský výběr)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa358ea4b4d345e665e1945135283eebeee81967682a813f5d7d19bdd1af408d9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CZD712200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63eab569d64110efd6fdfffc6a6c14ce410d0869661f5088886dad76e93c0715. 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/CZD712200093.
Chvastoun (feat. Michael Kocáb, Jiří Hrubeš, Vilém Čok & Pražský výběr)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73247e35e2aa0851288954623c3dbc1c5fa2ce6f40290929e563b5116261c5d. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CZD711600036.
Člověk bez talentu (feat. Pražský výběr)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e8a274508e48ff09e770b702991a8dfd2f3234ac6e948c50c0f9e712f90ca3. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/CZD712200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ec7eeb9fdfc723f478e35840a89db2aee7949ef645bea7407f9718809a1019. 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/CZA168800599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e63ebd3d07b842aa9ee7facd4d92eae6eb3907db78d5d5220d56374531f7660. 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/CZD712200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d960a6d0aa736cadc30c8d380a67014a542b321f55d4c7795ddaa2c0252a91. 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/CZA168700070.
Ach jó, já jsem línej (feat. Pražský výběr)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee1daeaef636aa73891612eab0fa9fd14a0807a7c4f879be6bf5c5ea34e5781. 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/CZA161300719.
Pán výtahů (feat. Věra Bílá, Pražský výběr)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfe6100d239138719a91067b4b206c24e4355608cfdbf7025994791781cbc6b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CZD712200098.