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 0xd39300ed6d62ba05db066f51497817d71f126c05bb7a0470a6099756ec5b9bee. 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/0f608587-07e4-4afe-aa3d-725c314ae9b5.json and https://artists.proofprofile.net/proofs/artist/0f608587-07e4-4afe-aa3d-725c314ae9b5.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 0x22462421e0a25473d4135360b364f07bc044b22abb9ae65ac4c01f7dcfad87a8. 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/PLI292200535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a21e5ccd0b1dc4832e28cd9089ac2764260b405a092fe924be21c02addbdb4c. 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/PLI292200536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352ee85c2f0aaf93f97e25c48064a7a9bf0385552dd3e877eb1a4680ad93829b. 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/PLI292200537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e522988da3f970a0c6740bf95b0f6bd79ed6bee2d41dce1ad968d3b84bc10b8. 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/PLI292200538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526afa3753c35d66355e6d7cf14c5b7757684ecd8922be74752a15f3cd627046. 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/PLI292200539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7d2834294e2c7fb4c0461d055ab947176c56666ea619adceec5460bd807e22. 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/PLI292200541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0928969cfc76d3f466362c8ce774f71ceb41e4518d8d52e9717ae29e0203a36. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/PLI292200543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8264f446d0d9bd1c44b99889849c6e5338eaa33c21daaed2343dd7edca29200d. 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/PLI292200544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cf10388213d5b463e8a71257fb78bc92f6350f67b9e4c2a4144338996e82ef. 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/PLI292200545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04134535ba673ded04df1cd7dee15c8b5f2b6b4e85ab0aa2249d2a47de366288. 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/PLI292200546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60e8d20d08fd71acf855c74a57a50aa4c8ca66688783c3e9d5a563a1321c639. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/PLI292200542.
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 0x7fa2c3b9e7cd17983f5311113f39051f0f2d1bf9ea094967c9333e8abe5a6c61. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/PLI292200547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ceeaea7a523eef840b07936fd3fd4b7c058ada4fc20511c44a5331c9fcfea6c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/PLI292200548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187e99c6d83f39f79662fba2d764f34b1a13f4280965b10de711eb1714c60bb5. 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/PLI292200549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa546b2b43176ad0bd929589b458cb453cb3f6ba222273833b32ae7e3cedba348. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/PL25M2400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b68c3414e0a763c1496dc7bac7c428b4f220010e456e84f869adfdb90495a5. 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/QZTBD2449630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b68c3414e0a763c1496dc7bac7c428b4f220010e456e84f869adfdb90495a5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBD2449630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb554f443be008ff4b235c62ea30e69422d5d7d80396a50f195d7fee73702105. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:32:19Z), 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/QZES52553708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca452ac7733efc4f0acfe525e7887470e4f2c87e9ccd0ac22e061f8deab6989. 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/PLI292400853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04d7d6cf219cfe41c227e981fd4f11fbe1dc75c6747397304e474820ea90f5a. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/PLC062117345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fc9059f8ab6dec53dda14d6d9fec30cbff5cd89bbed8540ea9ab2fe22c2c88. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLD112100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a6daf87637a38868c03680631f0848847884f9cdeb34ebce732f84ef942849. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/PLA680200234.
Opowieść o tym, co tu dzieje się naprawdę
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90821f0c881e2875667d8909b35b1f471a63f9b8e79f71f100285944e73f019. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLC061504255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8248ba15f4c7ba48db8fa5b7394cb99440d1411c1a855c300317e1a5cb8e94d5. 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/PLUM72100743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8248ba15f4c7ba48db8fa5b7394cb99440d1411c1a855c300317e1a5cb8e94d5. 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/PLUM72100743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2a823a2eeaf54cdf7185a7641852146b3d494eec9265c9d2c096b46d894f29. 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/PLA460501305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13f73ba1196175ab72cce309c93d0e39653077899d48f891d81710760953ec1. 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/PLF242209785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305e273fc222fad1077f656a3d97b2f41fa8cae26c5aa36bc1799af448e22185. 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/QZNWX2481277.