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 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 0x2a9ae930757852c2af9d3e4785d880035520a0233fd3df5193df7d84ae898f62. 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/e9120e3a-3a28-4e65-8d21-761d1673a7aa.json and https://artists.proofprofile.net/proofs/artist/e9120e3a-3a28-4e65-8d21-761d1673a7aa.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 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 0x3ae557fc253e3f7c6a0ee1846718f624949309cb3744c7c0a17217a9c92fec25. 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/USPRZ0910085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9804ae9072b04fcd1029d6a684c34b79d24f1053d2b04b578d30ee7e0407830. 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/USPRZ0910091.
The Best of Spanky Loco: The Greatest Hits Album, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf354da53ab5818fbaecf9be12985560162dd5ab9e56dae1fca984805aea2fc. 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/QMDA61317635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbf65fc2abff8a4801510a8a2d4cab0dbac27d39e97383c8a1fe27fa139f8f7. 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/QMDA61317638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bb1f19319a5b8db4f86af08d726240e25f9506034b9677daee883c82bffb97. 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/USUYG1470795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8ab5eb32dda3c36af700f9a0943a84331aaf6e6dfeb0533b6acea12afb7651. 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/TCAFS2112609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381064241db401cfaa1e1c48787320fc1bfe952a396dce9e53af4412cb30237c. 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/TCAFK2142871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae198413c3e555d0e4a3830c26bcf7ce20f20468dcd6a8a4404407d35030cba. 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/TCAFC2048262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22944a23ddca21c68fa8452e9e19a8c1c7fbd1ce638872ed3e83f37c05679f7. 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/TCAFC2047780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef9546e471aa553b7a010296a237076235cf9d8f08b124cbe918a3bc2dcc62a. 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/TCAFC2047855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8154eb93991b9fa014169aa34f0eea7b15a94980d63bb2dfa2cc16aaec24f29e. 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/TCAFC2047998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb2161266368f105bb019d651f3013f202d080314f069f05935e2fe8561b9f0. 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/TCAFC2048130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccab1bae3a4f0424e44c20780d669cff68a144b95504c5778f948a44e3b3e55. 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/TCAFC2048249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d26bcca7649b1b5e95d721412b7087f85ce11423104bf310dbdcfa88bc9ab27. 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/TCADJ1770037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329b4802d31f003389307fb2cd3bda3adebabddae365b77634d82e12d3de3df6. 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/TCADO1856600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47b9dfe92cc45f26d8191ea3fc81bb3edae7f7ffe48bc2a4dd54738c008831b. 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/TCADO1857553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c09c2a1003c815009c953465bee35c287ae926af03c8b97655ee9efb2a679e. 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/TCADP1831750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed747b2ee6bffa9565301cdfa60fbbee5bb44e4f2168c8f4d264d1858b740e28. 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/TCADP1843521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6710275cef8deefdb80a284241bc50c1b99e4cc191a3924b33deb81ee0724a6. 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/TCADP1831753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8c55c896da2858b68014f9581f611f4210c1f29f30629923d7ceef5547e2a8. 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/TCADJ1768321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23381a038708287043de8078b2e1b8ca1eea8119b2d98588f64a0d521dbbee69. 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/TCADJ1768329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6983ed584ddf8481d4b662bb0420dff389bd77407ab7258af87e022a18598053. 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/USPRZ1100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d85f89416c6f31891701ba5d7cca21b12f95940ce1c6d86adbefb92be123709. 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/USAM70536505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c97670e8c14bf6978d886e1095a43fbc6e5876af4518bafdb4fc7c3decb766. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T17:41:38Z), 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/USAM70536507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41accd234cfb224156573fc34bf258dc5f84ddd7386b8ed353e5db0d7078d9eb. 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/USAM70536511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae195c529694946e3076242082fb739ac4de681e4db7f9dd2b4dcf76cc6382a. 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/TCAIC2491737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6d10324d8b9aea912f86be6f209e9ced87b47c03812fe8f3bdf49d7265952b. 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/TCAIB2467963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c63fba2fa7b0069603c3b0098d7de7b968010fe0e508f6cfe91774ab8d20f2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAIA2482402.