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 0xe5e590d4e4f3c1bba06543b93a0d3ca840d2201ee73051eca1678017cfff241f. 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/faf8dcff-508e-4c5c-b7f4-3ea705e4b476.json and https://artists.proofprofile.net/proofs/artist/faf8dcff-508e-4c5c-b7f4-3ea705e4b476.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 0xf30b659058cc936e661ae023b0e47ca7b7b2a3b8d9a46f3bca4959e622d3ba22. 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/PLC062391730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2635ac0f64595b8b0407dd8ef33be6367a13eed6172fccf60d9a270f88a976. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/PLF242210224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972d81215126a44022bb72ebc8c9410a82f3862e242cc48cbe0ceb318e50a473. 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/PLF242107630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557081bf9d495bb509c571493e86d75d283062325f37e9950aca15dfacdeb4da. 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/PLF242107914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b279f18e3316384418f38b7265fa40ef1792805b5048baaca7f9cf4715e7be. 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/PLF242107915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb507778a94601bba7c4d15c49d65761baf8d0b071f8a5e4c73df408ba4684a1. 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/PLF242107916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c264b165e1e8e4c1e66772f22834d7b0c0bb9f9f79c7eb49628e514c3b85e3. 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/PLF242107919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13d50bbc4077d8cd3ee155333f739a3bb611be153889c786c66d050b2a3708a. 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/PLF242107850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c97a659085f2ca96ad4bce5b0a06c29fdb3d7528b56d33dd47bba73be01970. 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/PLF242107923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c86d0d254317bc94a5b4313153387a58cd239a27ad8ca984459f6efd3206f5. 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/PLC062115947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4668fc9dcc840b44dcd9b8bf493de2cc2a28b2447b1bb6a51b22287a2f7c7779. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLC062115949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fd7188e6662be6f4e85882a1dc256efae678a11a106204615ce9f18f172a67. 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/PLC062115950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562d95e68236147769bffd9fce75f4feb2c6aecfec3f3aad3b672731e5ad5bc8. 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/PLC062115951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f15f912111cd7c3875c4474db82dfe749389eea3ee4f9bde0ea0ee337802b0f. 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/PLC062115952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e95dd750fde11d666b0d60382cf9f4c3d739b9ee0fd41a3a77338887575467a. 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/CH6541896508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c6618c9b664420365c4aa967aa381698053799544a7b093f7900f95e24be0b. 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/CH6541896510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db6bfcc161201f87ed31ef972abaa3fd70c108608199a1b6c9910c084fe97b0. 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/CH6541896517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68bc66bc99d6d8d1e9caf9a3a0dd674c7b0522a3ab3ad48906cb8a35c06657d. 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/CH6451502889.
Aspiratio Crew I Zaprzyjaznione Pyski Mixtape, Vol. I & Vol. II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aecc07215e58c18ea23b729c5e16b2b4a8414d6cf3382829d05038f8e87a200. 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/PLE951200697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb606d87d87a9486e500914848847895e3ce7999279acdcbc59f1377529df87f3. 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/PLE951200698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed10164b213d9050384c359dff45e0fd41e8ae64862ef263134e3369d139a2bf. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:25:43Z), 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/PLE951200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70084d0e440b035ebaa7c9e840c5308e9322c441c7abf4803ce803c0d3f67bbe. 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/PLI368037010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95950babc30b9250083f0e275aca8aaf8918684e1513e80f1a4bf375d5ee055. 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/PLC062422824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b14c501ece67457f224b4eec22924e0a58ebe3ad28e201a6ea1af3a9a96b5b. 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/PLC062422159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e93e8fb5d1b9f82bdb67910ed81fd92078e20b515bcbd1bddafc4239d27f7b3. 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/PLA552400535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d35debfe43283ab5719412f183ae57d009093831f417727728fb77b0fece4b9. 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/PLC062366954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf4f0df893d1bd7c875a06e5f0cf0d6a80ca703844034d059a0617ce2605b51. 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/PLF242210359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6696d0c4f57d7324ae88cf617aa1b3002821f7383fb67189fa6c44024c32a8. 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/PLI368386220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c33d06d7f04330114cfc38a64674311612b3265fbb5a339832eed1fbca9787. 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/PLC062241378.
Firewall feat. Kroolik Underwood , RPS & Śliwa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732706474849f0bab2ea3b8dbc8ec378ee9c7b3fee414ca3529bfa301b3d18b9. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/PLK561400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59c6cf34693b64ca59657048418b5e17e56ec77d398372192e29e8c042ed75b. 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/PLV401900434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89c32c2b71a30d641e3b0b13384b8811f8edaccd9e16da353316c165fdfb67f. 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/PLH651700208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180524df3d6aae71c7a40b35d0204bdceb4541f7307b636632b66fd0053e4f59. 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/PLF242007041.