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 0x9444b8eb79eea5642cd904e4030e27c70a9f5c8d2e21c9371cd31f78217eedaf. 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/df96977e-3b84-486c-8fad-8e278ef09996.json and https://artists.proofprofile.net/proofs/artist/df96977e-3b84-486c-8fad-8e278ef09996.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
To Bude, Pánové, Jízda (Bonus Track Version)
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 0x615c5369216bf213846f507b4a1b0282f32b78cd759f833c5ecbc810e44198cd. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/CZA168500628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc050f513421917cd1dbb627953e4e8b4433d96276de198df378ce0c3cffa344c. 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/CZA168500629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ee8b058197486a38f0625f11802d247d1514d38b80496d4c076326d07c5b4d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CZA168500632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5575d46598cb9188574a9a9a80e547c49b2b791d7af306153240021eb16923. 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/CZA168500634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31fa1b96e7d682e52fc232ad615f7202291264b3453ece2d4da07cfdc3c403c. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/CZA168300374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6aa46aac3fad76416486705a405536db5d183a2fedc19b49d15aefb95df260c. 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/CZA168700538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4919817860beabdc2da5ea02b828d2ede12f4745b7f170218cacb9f4276d28. 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/CZA168700541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3214dc042a40515f473603c8c15a6675a3f9366928bbc162cf8489af97353834. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CZA168700545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe7ea8f8a39517cf829d1726303dd947d400c84f2ea13a24b26879f319f35e4. 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/CZA168800656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52292594a23a9b4db599cff577de2a7d869fbf3645844c1db89be425ca31724. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CZA168800661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50b68145f879dfa4eea34d4bec376d6fba31863789135d6bcbc6cb33f111d33. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/CZA168800663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a1ef064cc599bfcec8fd91c6b95694cf0a4c94f7df6606619b6a5c6a96fab6. 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/CZA168900514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac5b1781e89b8e74387c463b166803b4009a912dc8ef40876eef9f63e7e4227. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CZA168500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6225a72f1efbef086131d74993e2db16c612120d312a1178ad6fcf34d65cc58f. 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/CZA239900536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716f6009a450120446f6bbfeccc49e3ab14a4d39dc331a440da15cd88c4b63cb. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/CZA230300300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4dd3ea14fc818c6a3cd7e77ab00bdc1c4936cf804a313c4681435eec2162b2a. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/CZA168200410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba861981593b2b9a3590e4e0bba1ff16935f7cf698eb84a3bbf3188d716a511. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/CZA168700540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb1fd0cc04781004b28b48a771cd2b696d48ef2bd5e4b2bda5d7d1be72e4489. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/CZA168200412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31fa1b96e7d682e52fc232ad615f7202291264b3453ece2d4da07cfdc3c403c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CZA168300374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd366ccf6655d0616a8263e5c78e4d74fb62044f9679e8b3ccd1336e5f8fdd59. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/CZA168800660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92929637ff0663d17918e761c1174cd94a19176df5dc1468fc63ae367cdbab6b. 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/CZA168200411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9412fdaa8f751058c3d6aa0184d351ee14886596110e2e0f767d45aee886fcbe. 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/CZA168900513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe7ea8f8a39517cf829d1726303dd947d400c84f2ea13a24b26879f319f35e4. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/CZA168800656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3359a6008bb091c8a8d97b2d17e2750ca829e4b08e38dd6bfe5e8ff08afcbe2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/CZA168500633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e076655f4457ff8f688e5ff5e2d74f9cf952dfd88afe4d69d27555f2fa8017. 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/CZA168900511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac5b1781e89b8e74387c463b166803b4009a912dc8ef40876eef9f63e7e4227. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/CZA168500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07965d0b0303cb7ff8c06b1e0337ca03c1ff929a7b5f61a3dd507abc633d971. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CZA168700342.
To bude, pánové, jízda (Bonus Track Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573f7bab5207a1faaec8d5621b3ad6b9300418e0d3653009689cdafd926c15ee. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/CZA168400422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbbf86e09ec36b5d013b8f81ab7d112d39f0efcb97a83d0fa68d7e07f732274. 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/CZA168400424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df72c62988641e83dcaf8632367bfbadae3f18a2635ec3a6a495e9d6bf51e6f. 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/CZA168400425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4dd3ea14fc818c6a3cd7e77ab00bdc1c4936cf804a313c4681435eec2162b2a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CZA168200410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d76e52a717b6ef097d080cdeab9ca1c7618d4c2ec8d07f3bf377b27755c45c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/CZA168500627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9412fdaa8f751058c3d6aa0184d351ee14886596110e2e0f767d45aee886fcbe. 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/CZA168900513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2d653520d5d3aa9ba5ae3c8d1a502707707893cf5cecd3c81cfdb886da8f41. 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/CZA232500290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46545730ccce8cb6e10ec5b112d8d48006296224694cdfed570fcc98c164b65d. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEQ120405158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd366ccf6655d0616a8263e5c78e4d74fb62044f9679e8b3ccd1336e5f8fdd59. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CZA168800660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9412fdaa8f751058c3d6aa0184d351ee14886596110e2e0f767d45aee886fcbe. 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/CZA168900513.