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 0x272400919886c0818744f18e2c9d8b42978cbaedbff7d23e96ff85054d6850ee. 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/4954623f-71c1-4e96-8ec3-e195f6ed7e63.json and https://artists.proofprofile.net/proofs/artist/4954623f-71c1-4e96-8ec3-e195f6ed7e63.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 0x48a6801cd5eab4871a7de75e7a8d4f2ad88a4fe17947f24fbec96a5adf9ce3fc. 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/QZHNC2408258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1a0379ba73f0d8b6f3ae48adf13d239dff07e39e55e010d7b5765f8a34b59e. 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/SEXGF2388083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1aae0c24f4c74c7804ea30f0be93251a2b3122f26fdfe5a3981aefd918dafa3. 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/SEXGF2388044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f063a68e597604209ed103cb486c1679b9b72e6896d8421623f32459f5a5c8. 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/SEXGF2388016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3241b4d8e4356aa4a2950af7ed3514048e563298b2e91f4ba880cc0cc916f8. 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/QZNWZ2334128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86f853dbfe4377104fe273489b42590d020d358481b7bf676d5f7a7632a6c58. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEXGF2301167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad63020555e4c784f70ad54ca83c54e315b8f4ef840b4bd5694ad6d7883747f. 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/QZNWQ2365203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d727908a5ea1ad6f4c74edc09408079931f2e72095fac83f3b8b3d7fa207d5. 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/QZNWQ2352741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb272d89b7396eb17ac613608d3fa80e1f227ab3e7219d1c9e399acc368bec56. 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/SEXGF2301088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f3a9f3a6da891fb43bae6bf0abfe8ae0998412d5d38a8b38ea6027b40702ab. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/QZFZ22331423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5135063827236af3dcca21844086ff6b7a233fd284b30595937c6da44aa9067d. 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/QZFZ22331426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a99bd3e139fba082337561a33b2b633324716e1e01eb146a6c584c6052fd28. 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/QZFZ22331427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe250e7ecf4381f04461454b7d330b385447408b84f87a923bad281a44a9f43a0. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZFZ22331422.
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 0x8c33f1ccdf1a796bada181e866e5a3ada02e43b861674be8fe8734aac37b33a4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZFZ22331425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d016b0b308edc535e9836c3e21f3841691c90aac37b63dd0f033ebabbcc1c8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ22317046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb891251433d413dd674298dd57f495ddf62922d716f38c80b49dd29e3a0839ae. 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/QZFZ22317051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015db5f4a1b895db86bf5ef5dc1afe11fc0fd1873ecc96bec88a85c80dd674a2. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZFZ22317047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd555589f31e899542031ef719047ee03a969c3d582e2ae0582ec7a7e9e5d5839. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZFZ22317048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf19fe234388e24269101181769d0f185719de7b42f54f37dfcc833b42de2a8. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFZ22317049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778f0d1c9d8c51c32623fd46f06a82cf776d2115383d5aa5de6684d36cfbc31d. 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/QZFZ22314005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61545fe2223fc7965561a14e3b53c2a24f572e72c3c9480a76ecb3cb7a00548. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZFZ22314003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda05baff556c846edbaa3b3019e8a92aab0dce1896e6909a1533833fdcc05dc3. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZFZ22314004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61c20b3b589195745fcd47064e1605c4a950ba26205bc7d58e630c46e77801c. 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/SEXGF2300469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c2c5afa851cc203682233bded91e2893b4428c4c99b91c75087c24f35990f1. 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/SEXGF2201011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692c852c0c541e96afed6de094cd861d5690a352cfa17bc953ac1004a42b4031. 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/SEXGF2199101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2d0a1fc74a4b55f5f3dc5cadaa27a4b43a27dc9d1ed1e88ca51474f1dc1d53. 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/SEXGF2169501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800c6a245a1e9642f549ae1eb90b1badb552a8f2697be4f4a1d4f6aa978c9428. 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/SEXGF2144001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558d03e7899ddc10641687e638bc690a190ba3be356f7a4b7c21e55153a84e94. 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/SEXGF2102201.