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 0x7746ae7258ee864839343484f347efc65eba093d0f258be97d09fc50a3b57d89. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a6921b8-144e-4af0-b898-301ce503c12d.json and https://artists.proofprofile.net/proofs/artist/4a6921b8-144e-4af0-b898-301ce503c12d.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 0xdd9b0d0135a168b7be1dce23e951813fb5d5a4ec4be527cb285ec466a4d65fd4. 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/UYB140707806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16a27555e55a9b8bed1a9fcdcac0f6074d222107ecb7e9ea8d7a5967070ea6a. 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/UYB140707809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaea64701383e07074a28f625e3736aa26e4636dbeaff90edc348eaa1fb64c68. 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/UYB140707810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956ce602402b5b31395a832719ac44d9f574a36a984e37504dd33671e34c0be2. 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/UYB140707812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc2e7d54a3fb98373f9ae8ad4058d689173a2372e71a873828dd9e3b38b9b36. 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/UYB140707813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc04cc66b09b8d1a9af30d1017c6a4f31462bfcbbdda62b752002f3e59b3974. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/UYB140707811.
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 0xce6463e3f7ec84659bb6e3022e58790079f22cda10e9b8f966ce8d5fe69b8fe7. 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/QMBZ91533811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8283da3e4355e471553eb5ac3d96ef276edbbb12ff6943a42a671759ec6d6c92. 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/QMBZ91533818.
Los Proyectos de la Mente (En Vivo) [Remastered 2022]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df85f6ee469af30919aa7f37c8fa2140658ac340914fcef6f99dee923f47bce. 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/UYB142224201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d084cb83347f9ee115e8d4ce46d9515583c2c6691e193cdea3687732ba2544. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/UYB142224203.
Botija de Mi País (En Vivo) [Remastered 2022]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1219f71c0248757ca23cf009b2e46450c064d7c468a34fd2f6ca2070ebb476c3. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/UYB142224204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90376e1f97be0eb1d5f469cd77f389de992be740342ba82d0f1d4a2c93623db8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/UYB142224206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3764d3623ab02e06ae15caca3820bca03727c67971222183b3606d241de7f74. 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/QM6P41519013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90025543baeac36fd5b8248c78cfa51e9abec649e4aa8c97211f2e135268c56. 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/QM6P41519014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa08057bacd22575e91912be0b84a687d2552f118f4d421a7e82b90bd4cd181. 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/QM6P41519015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde16f1be507249d17952c1853ed65430c6cf6fe8588d2e485eda0b6827eef0ed. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QM6P41519020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ffa46c650012ea0f26572242f7c58de336eb823b611d6a5f2bf3229b4b38a2. 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/QM6P41519016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b335f4cbd6d8036cf5f0055ee748c5bb51981b7cac17ea5d7ee0729942a8fd1. 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/QM6P41519017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221b7f692902e3ed98d0a0d81ab1f8ab374998fc631b840dc62e438a257a7d3f. 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/QM6P41519018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa82660b36eecb1f1dbd9c2b9a2281d7950c0ad5e95d7c0a6c129a082f64c73f. 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/QM6P41519019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b9a4d127b025ed3a95cfb183594c3594af6d1e2f606dfbbd8539f075e658c0. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QM6P41519021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c240332242a80b2d0614e1c114a68b7e7a689ee99bd95434fd93eeaefc201ea. 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/USFI87600369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd541dcdd447602e47794d80cce9d1aef2726fa41c52414718863739da6888990. 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/USFI87600370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33d3b75b026dfb25a881e9cc031b41e20b5aef27385efe9baa4e366f9986fcd. 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/USFI87600371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab4334b7190821be7e6904544a93c19add4c2f0f24439721af3a2e4a22fb6f7. 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/USFI87600372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794d6e800e7a4d5733fd9d81076a1daae7dcde39d4d6d34f827a15e17b0542e4. 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/USFI87600373.
Tombo / La Escuela / Tombo / The Last Goodbye
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd497099d071771a1a1fd977b3d331183a9eb19b676d8011bfcf900f545058df. 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/USFI87600374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1fd4d1c693e6164bd703861d6dbe8fb8f939703d6a4f09658b89df31ae19c9. 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/USFI87600375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eab654be78038fc2380e0f3405901e9656156103d62a262135ee775115c33dd. 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/QMFME1521690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab764be1abfd78ec9194ba6c70e7fb6c16d2899e9391d5922e2d40a084880ae. 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/QMFME1521693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04560a4df66870e03a24e6702bd8dd45abec9c0c35eae9c16fc9d7f0a4a3cd27. 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/QMFME1521699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbdfd40681d1de3e6113b621ff33d544d12b2b6aa68a40ef4091c308468fcea. 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/QMFME1521691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a273ec1ecf76597fd817c2ebd5b968ec171cec688e07152e89306c8f3897512. 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/QMFME1521694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5288706725638f1b4505fda2a642604f9f6b2de1d242b52a046bfc2cb3207eff. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QMFME1521696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72971276cb240b5255df52dde77ff68e4b5717aba723e888f2b6d944a028ca7. 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/USC4R2332724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab39d9318941a6cd270e63b146b0269745e8cea36b25652c3cc9498dd9578ced. 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/USC4R2332726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1f7e6ebc27d17e9967eb5acfd42f7eab7428a3713ac6b513151ba834595b23. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USC4R2332730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258c9a2f8b4b99f24959d2e1017c743f2577afa25062416a694076816255be2b. 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/USC4R2332725.