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 0x99ce33136b0ef60fc6e34420c63fe99713e093a727b9c970c7fe6bbdffd9e1a6. 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/24e15404-463d-4d90-a57b-e5bd33ce7831.json and https://artists.proofprofile.net/proofs/artist/24e15404-463d-4d90-a57b-e5bd33ce7831.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 0xb21aef0b73ed5d30a96511b4d71e21abe3c09355a3ffd2859e23e2f03fd3a7d1. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/PLF241401369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc898040e8f89e76a24484dbc886912f2d4f5f1c01594b9870a997c06c1478c2f. 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/PLF241401381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004402fca111ac716e2277365e267e800bbb7d95d3f398b980cf3d5c4b644bbf. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/PLF241401370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc027bc51a877d87564d09bc190cd33b091e869f71c5eb3e3181f8445f563419f. 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/PLF241401382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6133ba7f75f28bd6cb4191f302917b0fc44141a48c04098731e8aaf0a5d9b1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLF241401371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908b1763cdec81feb4bd1a0a55bddcc9c73f856202a261c3fcac9a16c3680918. 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/PLF241401383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6201c9ea71eb76ba522ed5bdbea5efa25cc5ffbf59488e6cd0f866ff3f328246. 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/PLF241401372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4f8b5983ed77cf0b40c2bb839fbc02b6f9029933c99110ae8e7165d7a8a7b5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLF241401384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb60e82e955d569acd726aa762eea89f3087913933547638ac03ff05ce121877. 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/PLF241401373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1edce7dbaa4d23e2117ecd41fb4146c5ea76371df185e2777b7a25386e55779. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLF241401385.
Nie możemy być (feat. Beeres, Sulin, Aicha, Asteya)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3885a4adaeed36fb79dd0977ed3b6e21654b3b039aa2e7ed95bbc8e617166533. 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/PLF241401374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e385f28c846c5590aebf00518e63ffb2dfd642c3441a77d052ea4216a592408. 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/PLF241401386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b60558f4d8774eb38f340206c81620e8c86528be45f331d36e61a0597cc215d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLF241401375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9869c413b669ff587b28c535b985071cf74214ef06dade1463b97e9b7ccb278e. 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/PLF241401387.
To nie koniec świata (feat. Lady Pank, Peja)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806511f4230267c46aca19e6eeb4a7eceed198ddd7ba83b5b997101d6e0bcbee. 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/PLF241401376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcbc6e89b2e12b6888e9299e1e0095724a201c4363333e5eca9ec912de5629a. 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/PLF241401388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ff7e3074df413fafe1d4f644389ca369426a0cf7764b5af4d6624fe6d913be. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLF241401377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcd873d15ab86c3fd145f831a33d6d09d3e9eead360c5677c0df47bb38c8060. 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/PLF241401389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9492a0f441fe1ee8a73db5b2f607f291374c42f29d49cedec40d9fafce75f4. 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/PLF241401378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2ef34f21396b762f76ff74c18b345bd6b4adb477e1e80412fe7b24b0010b3a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLF241401390.
Wszyscy jesteśmy Chrystusami (feat. Kobra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a70bb136ac4908d9fdca8f278e411c2644e67f48a7b5ac26325f07dee17bd2. 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/PLF241401379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff76c0aedee0d8acb7f0cd19415c926bc0637a496f6bad51af30e5fcca73ff05. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/PLF241401391.
Zbyt wiele (feat. Krzysztof Cugowski, VNM)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47937a4b78673b96725742039fecba94bb2bfe6f544cdc9d62a181b21e94948f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLF241401380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1192a8f3fecd65cb48296fe9e95e1072bf18750e60156561903c2908dc72c6a2. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/PLF241401392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9b9b4931fa219519bc587c3730132cd03116f79a9bdc90186690c1bf8a6f5e. 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/PLF241401393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa928dded333efd322ae7362b9fbc6be9e67dd2ce5e572c7415457b1744384546. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLC062424201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fa0d18410f0f8753bf6341b30d75133246cb4279fe44ba732ed2a2135e97ae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLN151500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e0cd4f37fefc55222ee61e9a596ba543226f95e208b0dc5ba6f8df563a6d88. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLF241502189.