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 0x274a260d1c43fc64869d8928834ed9ab4fdcfcaea29b8fc6613360b28a2e6848. 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/0d7338d3-1c52-406a-8f78-547ac7b4ebb1.json and https://artists.proofprofile.net/proofs/artist/0d7338d3-1c52-406a-8f78-547ac7b4ebb1.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 0x329db140035fa74f78bbf36530f3e87d54406dfb32f9b6f5b047c7717c96013a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLFV91600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746bb8e9fc8ddc7134f9170402bc5f7108dfac5b84ed32b037e6fd92cf231e85. 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/NLZ130700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daf9c5b385f28ce17360c3aec34f2ae3eda4431c2d2ce64c51452af5b72230e. 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/NLFV90800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c79d9ada60e946eac2bbd6c1f1a54c2b71a10cbae12701879538c53cfcde97. 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/NLFV90900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a11b2f0af0cc10657ba20a070257031b0b8f505d7ec4a2dbe51d90750746edd. 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/USCGH1216776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5def8f42fa0d94bc46cf099624f948b44dd1bf7595358be241c2020c6be44ac1. 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/NLFV91200002.
De Gròzzie Van Mèn Buurvrouw (Derin, Deruit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dff19ae7d2d43393765bb9373c20044ba28124a099dd433109fd4b97893897. 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/NLFV91400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843bbb084fdc8da7db7f5d13824cdc6a8dd67a0b5967322240926da8e4c7009e. 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/NLFV91500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329db140035fa74f78bbf36530f3e87d54406dfb32f9b6f5b047c7717c96013a. 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/NLFV91600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1e2fe9c74216d67aa0dcdc72b39755e85319b6415ee571a28819de0528ba2f. 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/NLFV91700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1e2fe9c74216d67aa0dcdc72b39755e85319b6415ee571a28819de0528ba2f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLFV91700001.
Ik Klap Erop! (Skoften Sloopservice remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca83ab2e002236bdbf4003212cd4869037bb1881e88096806ac103c2256fbe2. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/NLSB72300030.
Vrij Dáánse! (feat. Noise Cartel) [Hoempapa Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccd81d574d515e16922193353612a2be622ad3329987b1ae4f7a7a9e62cda6a. 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/NLSB72300594.
Vrij Dáánse! (feat. Noise Cartel) - Hoempapa Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58eef82778ac9bcdcc3c62b499d4372fa7ac774ef31218f7690950d007052204. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NLSB72400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a11b2f0af0cc10657ba20a070257031b0b8f505d7ec4a2dbe51d90750746edd. 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/USCGH1216776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daf9c5b385f28ce17360c3aec34f2ae3eda4431c2d2ce64c51452af5b72230e. 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/NLFV90800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c79d9ada60e946eac2bbd6c1f1a54c2b71a10cbae12701879538c53cfcde97. 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/NLFV90900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843bbb084fdc8da7db7f5d13824cdc6a8dd67a0b5967322240926da8e4c7009e. 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/NLFV91500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dff19ae7d2d43393765bb9373c20044ba28124a099dd433109fd4b97893897. 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/NLFV91400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357458c66d912e67f03e051ff7a8f8cc9491611d214a459ade9ac7846a725955. 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/NLFV92000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f2b16cb1afd094b1d8e665ea0e1082c9d94e4f929cdb32c46293f36f364726. 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/NLFV92100001.