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 0xcfc8f386170cffcf43bd07a5408fef0c404566052e7c71669973e1a8317bfe95. 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/71689989-add6-422a-99d7-efbb850141e0.json and https://artists.proofprofile.net/proofs/artist/71689989-add6-422a-99d7-efbb850141e0.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 0xc364316ea08add8c2a6c9697033da06b0da912dccd4308307e9470641b945124. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLUF92300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1127281326dca52bc66e6c8d5cb634658424984d3d279b1c6161fba6573a31. 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/NLUF92300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbfd7084422eacd983487e4885dfe7fc70a0cefce3345e94c4c37b685292966. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/NLUF92300019.
(Een, Twee, Drie, Vier) Hoedje van Papier - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9916040c3fc88fe115245b3472d0cf03794ad1e2c9a2522aff9f4c5584b2052. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/NLUF92300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecd7fd9a88a62fb6731c799fff92b01fc3295c5abf15ab1c35dbde9dc43ec78. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLUF92300022.
Kinderliedjes voor jong en oud (Elektrische pianoversie)
Nursery rhymes for baby and parent (Electric piano version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fc32d3cdbeb341d87704611b3207c4c49442cab63dfc32fed53dbc7a867855. Chain 2 (Bitcoin): anchored in block 957523 (2026-07-11T04:55:40Z), 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/NLUF92400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5953fca0cdf8ab82dd68af8c8c3f7d0a1f1d1e541042d0119a9966fa18abb4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUF92400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacfb7fae50bb6b34e9b231cda0a99b598688910abdd86d8562729247e4d2f35. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/NLUF92400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a0649d60e9c2a7c125d19054dede27c750b0f616008f510ea96b73271d2257. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUF92400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28b4103df8d9f548166bab978fd1721b63c499a21214a72e76065d45ccad6c0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUF92400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d7eeb9b05f5bdcbda4364cd5f7d79349f45bb9011f886558400ff73670de45. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUF92400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89359df26a35eac0830c2bbd23c6e6f09d299ff11330bce8a2ead6dd076e4e20. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUF92400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6dcbcc0c03f53244043530302d3cbeee1979c10123bc438d9483727dd35a4f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUF92400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71f08c8089c7bc46f00927dd202765191d22ff92d4a7ca6a29636c8ecfd0063. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/NLUF92400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2815a4057984057a396b32572208adaab7465eb9728c557236a5834a22c1466d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUF92400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25b8ab8df56b83ba6518ef75f1016b3ab4c04cb733f682b7469151d1bd387ec. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLUF92400051.
Nursery rhymes for baby and parent (Vol. 3)
Liedjes voor kinderen en ouders (Vol. 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0483aa5e6598f87f4a0768d870fb350ff82ae916af5ee289e742c0e83710e7e8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLUF92400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7983b4bd53d8bcc31d425774ee3431345fb08c75ca34b03040b449b154d6beb9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:12:14Z), 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/NLUF92400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb95c2d87cd86428b9fcf868c2b82b5eea841c55b09cb8399d661384a990fee4. 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/NLUF92400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11532dbfe9fd92bbc38dbbbd881778fbbf40324aca39dce67aca544d63f8ec34. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLUF92400105.
Little Heart's Lullaby - Piano Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa92d4c482b6f0a503e297134c03067514bc330998477d12ca66944e3f3843d2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLUF92400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593099eb50c27edc421dd5765799fb73ce0ce56331c8de4b45c619b5b4621923. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLUF92400071.
Dream Your Little Dreams - Piano Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f99a89a32890ad873a2fba375d2b6d7a1de7b9ebd3be2b7a4866164d65f344. 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/NLUF92400074.
Lullaby Of The Stars - Piano Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77302a1d9bedfb525555fe76c46dab724758a8b11d161de50a6f8f7e619fe8ef. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:26:11Z), 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/NLUF92400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad5fa9776c330a061ad6910170cbe57f9e6c5c88250a337f5cca3c6c8274138. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLUF92400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0483aa5e6598f87f4a0768d870fb350ff82ae916af5ee289e742c0e83710e7e8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLUF92400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb95c2d87cd86428b9fcf868c2b82b5eea841c55b09cb8399d661384a990fee4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLUF92400103.
Go To Sleep Now Little Baby - Piano Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a32da362b89a078d0a698ddddf4c3258b71cfd392228a33b330360e28e101e2. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:20:23Z), 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/NLUF92400076.