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 0x1876cde742f13db94c3d1c7da75e1c2dce126ee77166e2dac751d75dd9f964c9. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22a2b2da-b2a8-4170-9ec1-7f2e53bf4e57.json and https://artists.proofprofile.net/proofs/artist/22a2b2da-b2a8-4170-9ec1-7f2e53bf4e57.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 0xc0e706a96192f56d538e06d50bf05876b35246b4f6d6f533e49a0dddfde7c117. 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/USHM82366801.
Quien Entienda Como Es el Amor Que Me Llame
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1f974e95303dd379fc137734e5e437fd964fd988e12a4bca3ce5298ac7e941. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USL4Q1996294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75703a4ffdbd0051f836423f507d5adfae4e2a6af4c17f311ce2f8c281148e15. 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/USL4Q1996301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a9f6350236213df8202bcda8347ca47b4c574da53d6c2b22636b018cc6b51b. 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/USL4Q1996311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e553e77ae24fb3c0a7fcc9fe50df61ab7e811eeaca0dd9e5a493fa6371154bf. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:35:30Z), 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/USL4Q1996322.
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 0x7db3a78b1d3b90ff40f0f1bed0d7a0b4d660ef402a5f8d8fc641e92aa941d4e8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USL4Q1996298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1132386cb2caf1642cf17d017aaf2d3448476b09b8d5f34e7114b3d5b2a9bd0a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USL4Q1996305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55bbc3cf02eabb51db64bf9694672a1418881c014b345dceee8dbfcf7fdc73f. 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/USL4Q1996319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaed786e7ad7a503fcdce19c878069dac9a278abe3d02f5e0899e26d72bdfda2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USL4Q1996329.
Los Éxitos de Lenin Pulgar y Amor y Gaita
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df3ea0c9046f67e19a7fca8acb60eb84dabb15d74cf12502f611e6adbcdbcb7. 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/USHM81831822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8fae038bf0de4b1b47eeb5dc78bc87f21eac98f35a7e6ce0ad00766d79c094. 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/USHM81831823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a49a7df5f8e7af4beb2b41b7bfe084e3ead778ca8b85d676ca1d037fd7e1a89. 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/USHM81831824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8ca54a3446554c427aa28ced9c2b11f4d3d54c28eedbf48be137f614667c09. 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/USHM81831825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101a58a47cea16d5b1c44e8c611fbde8ba6c22db3d3605113eb6dbf2c07389ba. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM81831829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff9af53c5dbdeeaeab795eb4bc79954602ead19c1ffe573af771f30c6854d7c. 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/USHM81831833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65c4cd18932e8c29c4898fc85787c88740688c6413fc107135e74da7af4ba40. 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/USHM81831835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b16088fffbf0f7988660d5663748a4bec57ced6243ec01c76f5b3d93ea75fe0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USHM81831826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a6fbe52972b9812c80638d18a567a7a7aa44b261446528a69960ec78ae5c8b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USHM81831827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e342a1e63e93d0006676886659b010681b8c75faed1cd95e3e811e75cbb91b4. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USHM81831828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069ba177789cb15ce3b6ba09489dc26860bf36ed3892400e6d9a863720c71955. 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/USHM81831830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2acee0f7dcdf5586870c1907fdc63d918f39f0f01066e1c2cc2e82634fc01e3. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USHM81831831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f195ae2d8b4ff0d8f6ad4687099b52edf8bf2a2c7666252215c0d8b8cbc83c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM81831832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801ac3cddc626001a8af0f5d4e0217a585c89f0e0409d718d07dc71b70317dff. 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/USHM81831834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1431a06ce21aca7d0a31abbfc8bf07269d4abf07141184e3ea1b6107262017b. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USHM81831836.