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 0xe89ed47802cad6f17bdc47492adbd79a24d1b4b34217424657e8b012be432256. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0d63858-7ed9-4dda-a47b-e9f3f81cd101.json and https://artists.proofprofile.net/proofs/artist/b0d63858-7ed9-4dda-a47b-e9f3f81cd101.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 0xc9b5fa5b173d921d807b3c9c34f2512e9dda900ac0c8c4507ac59bc65b3977fa. 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/PL52J2226344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9532fd2be31d7580a5ad82aa32b8b46696cc97879a2737cb50b0469090c5d50. 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/PL52J2226339.
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 0x12f8fe24ec28aa8106aa4eb6d7598df1426fc18a83e166c921079e8a98500acc. 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/PL52J2226323.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a7425955fbb073253ca0e4fcc9043fa0cc6188caa668a6adeeeb5ef61267ea. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/PL52J2226029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397825c1d4888eb83bdd4dadb35130a634d0590d3c396b9c7e45f21b306dfddb. 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/PL52J2226023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090acb230778d65d7d0b62fa1977cd73c0f15fc25549182d97141876769313bd. 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/PL52J2226020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d366ed94e00a0336c6fc21ac3a439296428ce3a0bb9daf5e5e13d12c7b62af. 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/PL52J2226033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb435b50b2515c907af9f2673299f90e12f80ee60184fc7b4f5e64a472a9fa499. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/PL52J2226025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3382c0f29997fa0e8603a6e17230a24057a751a0ea934e992ed96b84af8921. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/PL52J2226024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5385667b5dbcb13f6cf38898d01afb226708ba468ee5851dd3586f0ca9b86c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PL52J2226034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe63e82b982a1c5f290b2a0cb9e10de5d4ae70c1ae69b471a860055a20746de9. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/PL52J2226021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3eba05489f462186d411c311b97ac8d8af431de2e59ca9cd851834a9e467c5. 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/PL52J2226032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7a686985321075e5b54364b7290252fba20521649a381cfb962c123b39af3f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/PL52J2226026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6470b734f949e688818bfd8daece5cf7fab09b90f0e8300c724940c752051f62. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/PL52J2226022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f32d35ac290c16fc9fcc407c0cf2925b33f893abbbdcd28829eeb1ae496a498. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/PL52J2226018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5c0edc86d6edc191e4277c04059eb985ee2ec685ef3eee1d27f1273b57752e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/PL52J2226031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78ceb5723f8df8f63805aeb6d32405a3a19cc6e5481827e6ca6f599668e896d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/PL52J2226028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3def188a784a5364b67e3e4bb1fbbcca5767a5a87f14d9e975bdb22051768f5d. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/PL52J2226027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d6870e05b5c484a1bea6e0e3edf212c811408ecadd62c7ea95d081892ed8d7. 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/PL52J2226019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fc7d3a57e8238c9ee342557ffcb39a8242dfff22397d3f8818eaf21d713210. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/PL52J2226016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51a52969385bd37e78068fde052bca7b5733be26c71e1554fac5214b69f7ad9. 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/PL52J2226030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75816d38ced27d54aedbddcb424ab62f19bdf0437580d1f4c8409e4592202b33. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PL52J2226017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdac848f4d7f100393c816f9bff8a4ea6bb58e6c359f9f7c82fb1f299a9c939c. 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/PL52J2165254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706e8420f82c0b05a94664f55ff27efefd2def963f03c5b906acf6e5a2a420ee. 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/PL52J2165245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6873d4c6d27667d8dbc6da99cf14ee4cfb7f634318287709cb78c01846f5dde. 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/PL52J2165256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fef21c530b7c56f7bf469cc584db92367bc09a13133d5448e051d38c0c9e70. 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/PL52J2165255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba75c870a8951a6ed351740aa6309f421ca4b54a0bcbf01332c59c5b39bcc0a. 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/PL52J2165248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df1e6f8a5dca42eaa4abd21f62cfb79197caec659ada56bd491144a29ae5678. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/PL52J2165246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a24f8dbcdd3145a6befc2ecbd0e02fa994a788202e2aa4bac719be18a2eb090. 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/PL52J2165250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653f930be55f3d7a66dd9858e04582513125b40b91422865d29cd13dc3321a3a. 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/PL52J2165247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8638a289fb23391dab1c6539fc3d0bfb3351031c012514a0ad8bd552e293f1ea. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/PL52J2165258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c59b41850d7c1abaee0b0bbb1a3d98163754024d806b72a0efa664a8870791. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/PL52J2165249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b64249fa9487e10a8e38bd2cd41a91a9537803f49f9fa830e8e0d745232dafa. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/PL52J2165241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd701f992f37582b7e59fa9e11d95ac55aa15120bee27a4bb2ad8f008a389cf08. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/PL52J2165251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c97a136bfa632d21df5e6f8d7523f6162c5576ca8db9c5b9e55008779b92f8. 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/PL52J2165253.