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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396c6dd7c7016aa35eebbae04b89bb0b3275f9e59ee6e38bb76b4cf4cbee9b77. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/350b5abf-846c-4085-9402-01ead0dfe8fc.json and https://artists.proofprofile.net/proofs/artist/350b5abf-846c-4085-9402-01ead0dfe8fc.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b0582e2936bd198c5caa2295b07fa0155e06e903fa79f580d9df9c1efa0576. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLF242107792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c09b069c8a25d131abb1a5a36dcd559563b24cce0dcf4b9c4b3a37b2af51ed6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLF242107798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d436bf7511872c9f11a41ba5d64a01db2f9a1c33f4e3ddd892f6353b76b1226. 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/PLF242107804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367f46e388127b1fea9936354f6fa3a9697ad4b064cf899c1df3ab8283cc64fa. 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/PLF242107805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d008d2f5ab921a1332890c675ed59744654e69f88ce963f53caea481cec56c7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/PLF242107794.
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 0x6e4bde7fff922476ebc5b24350449a8d223dc6bdfd557b94369e4f185c4b2395. 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/PLF242107778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f4f22b4d81a0ec689a0f291b6851ec2d1b71d6f4d11eec7052dcca0b80a311. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLF242107782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3c380d2ec7765f353b1f20c606d8d874984646ff59f5fa68480f719060a80c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLF242107784.
Droga (feat. Heron M.W.M., Koni, DJ Sokół)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6556b1725b95d9cae44e2c9f142d791ac5fe02da29c32a72985c58bbaea227f. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/PLF242107779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2560805598cedbcd5b8c665687cbd48de58b3757775208aa38d65ec264136321. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/PLF242107781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07537a657d60ba4e11d8f6775f011e8881abf92b7c0be466d97eff5c75c1c0df. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/PLF242107787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bca30062e32ca8a1f8d6b8baf57559890f053fcd6d6fbdceeb2a3714145db66. 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/PLC062416394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baa15d75221582cd01ac675f46699354bcf9b35986ecd74d605181f7310407a. 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/PLC062394879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa366f7284b6fc4bf2e1c58e0d1255ecad2a196488896cc65db0c10467056904d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLC062255946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f6771d502ebcd4a5dabba69ed921596c7e3b29caa0eae716bd9b8d9fab8ba2. 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/PLC062238735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392df77d23ef7497e610d887d406f8f3af1b8db80c5633cba9627528d5a59672. 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/PLH511200661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619a78181eb9a010ef86da9ce72ab589ee217201edd32fce4c0cfac11646051b. 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/QZ8LD1933140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd488ce8b9633851f357e3b449a060d6b36c4af1ae7df9718f10c7e7a7265aad. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PLC061807189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23399fa8c111552441ce8c95f650d2034cdfda9a06a22fbe73c34a50c680ed49. 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/PLH511200747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25121425d74b29a9a4619d67917017335570a513047d17bce52965ade3998abd. 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/PL88H2100602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d812437bd2a648309e711b9bded0d5a16f19497f8c7bba97099be4947fcadc. 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/PLH511200703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392df77d23ef7497e610d887d406f8f3af1b8db80c5633cba9627528d5a59672. 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/PLH511200661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426ea83aa713c079db0897d7e67061015ef2df1044718a1b8234efb0da9cec59. 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/PLH511200670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5db028e84aff6a1b34935b0a3de974ea32e22563e528531b06a6309a6da758. 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/PLH511200648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd902d83624f1f70bda86ee126bd6e7b83ee1617cda5f4cea0d3184eb8148c0c. 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/PLH511200650.
Kto sieje wiatr (prod. Ceha) - Kto sieje wiatr
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf634d76c82f7fe1d87d94cbabc03f40d2ac9a80e11921a37fa6c6c89547954d9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLH511200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f61dcaaa46d575d0d1156d99182d066419bf7e969c67252d4ef47344a5b4032. 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/PLH511200006.
Gra szklanych paciorków prod. Ceha - Gra szklanych paciorków
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a01f981e26d7f2c54a75935a64e6e9797632a3a7ab9545ce91da4848f29b8b. 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/PLH511200495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858f34c37adb8b8054b12c9241401eb6a33e714fa1bbb051b0132b4707077f34. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/PL88H2100604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacd8506e99bf2a473512a539051ad6171188c325d842d0a4774e9674a13edb8. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/PL88H2100605.