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 0xa0ea110a727aeaead7375ef9132681f899960f9da55d54e9f500570d74b0f1ab. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac8c4534-0ba2-4339-abf5-b867d40df28b.json and https://artists.proofprofile.net/proofs/artist/ac8c4534-0ba2-4339-abf5-b867d40df28b.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 0x77729c098f94dd6407904ff6ad2ff167ec7dd237871995e8e1c4ac2dbab14af1. 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/BEEG61800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09997bcad5c42d985feffaa25007d4069a2bb25a04c23b90b9c0441f724ea736. 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/BEEG61800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd602960f11b0a42c06113dbb8f73d53affa26485e6f66aa9c9d5f61346d26839. 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/BEEG61800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a11256c2713b51715be646c92840ad7d3075704ce27b1c8c9f3d3d7a9616f5a. 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/BEEG61800205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd074a0889bb8357a6d3e9bbad9d6f546fe290a5315e11a8dd6e575e2e19f7108. 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/BEEG61800207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe825052964c3070180a56183f76db089e5efc61ca53054205eb218981522f9c. 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/BEEG61800208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571158d01aacda8422a10f4e8e534830338c9cfddd8b1342de49659f308c8818. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:02:05Z), 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/BEEG61800210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdf6064a1c14f7bba28f32a74e881896fe41e33a68e8eedd65ca34483e7017a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BEEG61800204.
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 0x7c05b9ad0ddba349a421782a169eb6bcc81c886d8fef09b83c9f6ae492f7fb42. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/BEEG61800206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce9c213144697e991bb36612323bddefd50c7514e35a4c6dde055c00efbc0cb. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BEEG61800209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae231c4d098c7d0c040b8377b254b5c4f9b0eccc608387149fd773a0acb38fe0. 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/QMFMF1458264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30bfb3fe1d13b7deaea9417bfff408b86da92df66372a6369df1bc0718025aa. 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/QMFMF1458265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794542b659e8880dbfc1ab9353cc6c69522ad39952a0dafd05fa696bdbd97dcf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:20:39Z), 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/QMFMF1458266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbe0e1afa3b2f0d6220a82691b837aae5eb05146d658e2b58da19f0a8c23a81. 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/QMFMF1458267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6e406f21b211b2581bf5398a1ea1765cbb0e3528860da42e26886ceac2b509. 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/QMFMF1458269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e71ad021bba768ad4920bfbd28ed02f3fd96653b4ebe3fa4cde8ed3fa0a0e4b. 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/QMFMF1458270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c63a3d13ebee0a4a6b8487345dc83f7a1ad326cb3b3ba50a82c1f6547ae931f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:02:30Z), 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/QMFMF1458271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb254dd19a43aa26e7ce0b103c95aa58b454b324e6edf93eabc005da9533175ce. 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/QMFMF1458274.
Nights in Trossin / Retour des Hirondelles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68e5534b40d0a53f317b27098f1b12aef3689f5eef856d63ac6fb69d93285d1. 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/QMFMF1458268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3437ed5ecc8997da84079a51a5cc50cdb255e74f707feb34ad6b6e2bf1c53e52. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFMF1458272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada5c6672ba71c67deee1f95d233ce7abe8f0deb9a32164a004551143ca54542. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QMFMF1458273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644e97db4e82e30613617c84714469be7dfec55d36e5d958dd784eb9368651c2. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QMFMF1458275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7179606881f1133a7e9cc0736d3d67c8151e8ee6a307bc5311c498339f9f8735. 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/QMFMF1414306.
The Sunnyset / 3 Little Owls / Histermeppie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5ba36ee0efd3fadd6a9b622b5772e81d0a318a4aa5cc8049227e27d672d0e0. 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/QMFMF1414307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf087e5b949d458c42a51208b267a58057ac3ac352818f05090f272c279baab75. 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/QMFMF1414311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af21c554b866ff26039089a7db8579adb595def6cdfad049519b04a815dfeee. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QMFMF1414312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c944cdd133bc6fcd34b213b46e787bad88263a358b84db705d0511a3439f9f9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMFMF1414314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f962d79c461863e1b28c755dfb81a231f6e4bbc50518a0c4900a9441f57a77. 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/QMFMF1414315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ef3e0e65507435e2509697ec74d66031d403daad99ca56df8068bd3b38b3ee. 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/QMFMF1414316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20605bd13d76a0483d512f53f25eb5b0c9406c1c6ab4af5ede75e2e4ba143700. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:33:33Z), 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/QMFMF1414313.
De Glind / The Fernhillfriends / An Dro de Vogüé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15113f427a2730dcf916122aadf39d1881514a8ba9901177a8f94f8294fdea8. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QMFMF1414308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffec6bd09c2d899104996ded0ec06967b37f86e425c4eb96c3c903378f52b6ca. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QMFMF1414309.
The Cherrytree / Le Train / Copain Planché
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e168dc9191db7b9f21859a91f2baeee566d1604a44487691b66091ece4d97ae. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFMF1414310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0527257db80a31ffe36dc2df36fa10a7d4eeda1ee2c39e02b50fc86e979083ee. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFMF1414317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a55e821371338650a01c5056c7a27a49aa902f7f9f0b8a369bfeeafb9b6b339. 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/BED061563007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaa93eaec6ca04db436a798000d94a33a6452e359cec6b2f9f24e53bf53028d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BED061563009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eb84a2606268976b11ed89a6465eaeb97948d683a59c84ddc7d6a8cc20b749. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/BED061563020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81eaf5cd13cbb57f80096d22ca4339e69bcd63b1dcc9507d8262bf811e27a8e8. 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/BED061563021.