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 0xdd75af9499ed3a9505b0dd4d999ad78a1620051f2f35754bb105e0ff2f84366e. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e6b1019-6c33-4867-a6b3-2e0e4e68b8d2.json and https://artists.proofprofile.net/proofs/artist/9e6b1019-6c33-4867-a6b3-2e0e4e68b8d2.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 0x602c0eed37c5dc624589db3e57c1a40c2fd48df034dea8d928435e160f4ea5ce. 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/CZA232001330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1c420c58755930186467ac61ef2050c007110cae91a74ff969917d6c44f376. 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/CZA232200557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887c40c24ec114fdb49866f2e9aa7ca78a0abd50ba1166473cc8684950f97067. 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/CZA232401209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cdda6546e7b7f8ee2de6f901f823b9a0d260048a808b914a573d6496bbed0c. 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/CZA232401210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9024a60a94131886e8fd60edc2fab6224aac7545adaec530185ade6eba28b86. 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/CZA232401213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33044de6a2f2fc9d667753e7278c4cf42b260a3e0e222179ca5e243302c2e93c. 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/CZA232401214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258d1264cf6d928788a0593723057b7eecdaca6003bb67c94c94cdaa28d0a644. 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/CZA232401215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ea004cc55f5deef82c9fd33ffe2f0180fab634ea5e1f48a4b53d9f96ca7b48. 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/CZA232401218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc659f0e5fc543c93c67f53fef3a36ed51839770ce6cb9a57f2faff34dc291abb. 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/CZA232401219.
Underdogs (feat. SamDitQuoi, Danjo, Filip Konvalinka)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0af733b1db19141f6afab3efe038216a53907b7964be812f1d9d99e9b7fd7d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/CZA232400876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413a6745cc496410ed8de20c060b4cda5d302148ac26d4fa75784457f63c297f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CZA232000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de221005f3fab5331f4df438e3d2c26fe7ba1f0726215ebcfff5f9320bd2590. 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/CZA232000186.
POZDRAVUJTE PENÍZE (feat. KAOT'F & Fyah Son Bantu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e611528e09d531bc9a9245214fdad16ea11359ebade6588c9b19378f6953fe. 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/CZA232000188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94159a6d35c1ea8354c722743e6329168d9c198aaf23574025d51790e0390f50. 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/CZA232000189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85bb7fdd806a65a194804254973be0f24d2fcc66fe6b0420b0469fb9d2a0b39. 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/CZA232000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99eb9a1f3fd02f4494c00d9d6bfa43bf808e6797e5640b05ee01c51a7a5aed66. 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/CZA232000192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65db42ffa708f4e687b1654376baed1c29f65791705f11672bb70fbc66d58a4a. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/CZA232000181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd144aec32fb7984f731120a78d35cc0cdd1a0cfcfb4c5188f45cc0459bbca96. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CZA232000182.
FULL CLIP (feat. Eurodel, Deputa Madre & DJ J.Kid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e5caee939dc8534ad98190468e2ea75a1f7f8c1e7ef4488de7214a88c11dd7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CZA232000184.
PANDOŘINA SKŘÍŇKA (feat. Karolína Krezlová)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16bdef40a8955cfa7e661bbdfa82b987741b0191494ae0487c273c9b4b2d789. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/CZA232000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18525088a88206b7980690956df56210f5c2ecf716dd12ce8c2ae19d8bc97de5. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/CZA232000193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb235c9febeb9763f4319a1e67e960acc6bfc8e082082c5e2f59467e54eb56ec3. 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/QZFZ22550711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cabec95c517414c6087ec97d1d57200d89bdd8dec65f3ba452f4dd451730494. 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/QZFZ22550712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32c5640aff8962bf707534f94848083e4bc97621271630abe327f8beaf59322. 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/QZFZ22550713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5e4a40f1b39437664240f9fd1120a995ae8562cfc811e3b6da7d1f252b7001. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZFZ22550715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f89d692b8fd04c6bf209aee37c9411b1024c2df6adfda94e5278ea3aeac5ec. 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/CZA232300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28cbfe1b2c8f3c26df7a82e641f6356fc6749cdfa4880c34dd2a727dbc49e54. 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/CZA232300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fafe22d6925482e8b0e7d4ed49ac9f59354794267a215b38768fff8c8a8353e. 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/CZA232300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb17655c27f97863421ab665593c022ed5897638c054fc5760c3a0fbeaf9caf1. 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/CZA232300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d9ff708b9a1b752f2bd76d5f8e3ff61b22f964c8836e7298c778f47574df2c. 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/CZA232300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29501184f2dd76a8e0f274ce314dd479acc962c4204081b514ff0265505a16dd. 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/CZA232300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd5844fc59ad8b3c7c2e89d8a70c3ca2855926171df0c3d442a43ce734c32a1. 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/CZA232300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b1a249751ebf7689ff850e4aa7c8b01b251935b669fa4945c22358279498f1. 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/CZA232300216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88569327411f5ea1c782a47d207bf013c30595d811282eb1c5f697565653facf. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CZA232300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d678737776c752deee3293494e96e6af690a86d3be72278b911a59f9551cef. 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/CZA232300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa762d87cc07083b3e3898d95a0ba0fa964f048b2d1ff7a03849595ba6321d42c. 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/CZA232300219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4548ef4f8566d1fca4081ccb316f8b9c3f07ed56696f1400f9357ec4f45d1ec3. 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/CZA232300223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3e85e6cf7d1a13cbb53215ab2ffadfeb91bce2ac67f9c1b039845981525e49. 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/CZA232300270.