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 0x18ad920f2d68571346eb9398ad0121b37a0ce223a66dd9e5aa7e9ccadebf9cc5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad9d700a-535b-410a-91cd-d7222d8741f7.json and https://artists.proofprofile.net/proofs/artist/ad9d700a-535b-410a-91cd-d7222d8741f7.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 0x5ff356175c0725cf0e5a5b0dcf5cda0962a2364c38624611605ba5c66fd962d6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLC261800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa20660eb3ab44965fabf90b54792c07e0fa89b58b759e2ce1a7f33511f5456. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:22:23Z), 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/NLC261700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc193d8fbd8fcbbc07c7be79b4c8a808edd86657a81e213183f85a304676231cd. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:58:16Z), 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/NLC261800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbaecf8fcdf0e54c9b66e6bc5162b99c8c1543b8ae91dbe210699a7eca70a61. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLC261800039.
Alleen Zonder Jou (Titelsong van Zwaar Verliefd! 2)
Alleen Zonder Jou - Titelsong van Zwaar Verliefd! 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af481a0022bdc6b28069d43542678b9f0b6224f428cddda4b269a9672a97f61. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLS242000335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e8ea3f628ab863e199740d076fc0f6950ebee70adce968bf99f4021cf9a488. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:25:50Z), 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/NLS242100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee271da1e0f815deada3f3a9fb8f5b1dcdd72745d105084ee3751490c022dd6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLS242100152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61781fb2d2e69bd0b9b17f2ad130fa2ff60f85b9e31a4435ee0b02328fa1158. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLS242100641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e709e57a867a234170f967975b30f6d6bb5c10707ba86da2a9835d5724c6077. 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/NLS242300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75cbadce87f839e42e0f5b1ddc39e19aa1788be92e8ad5d7aaffcb8c39fa512. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:25Z), 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/NLS242400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b6ffdb034726d7f19b471619bbe5b90c28f689fcfbc65b59ec6cc63e351f22. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLS242400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0308d34723a6a9e8678eb94a8ea57bde24c2813a4b0f543094be5866728d51. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/NLS242500117.
Songfestival: Nederlands Trots In Een Nieuw Jasje
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49260a6deccdbf22999a3fd89e49e0ac73a416a3443f0a73b1e8601652f115f. 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/NLS242100214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1be151423a18c1695a61170468978e80d0b1d533c853e87aea76b67736e6526. 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/NLS242300424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49260a6deccdbf22999a3fd89e49e0ac73a416a3443f0a73b1e8601652f115f. 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/NLS242100214.