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 0x39f56a45ce2c6236997b46a5b41a41cd1049bf57feac04a63a7f1045da23447a. 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/bc8885e7-3af7-40b2-bf24-e894cf077cdc.json and https://artists.proofprofile.net/proofs/artist/bc8885e7-3af7-40b2-bf24-e894cf077cdc.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 0x9fc6efddb5a911302cf090c5ed01674a6164e7fe896b8827d8a7a85c976a8516. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/COF018800342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd90825a1958aa224035022ef33bcdbb529b9f300e537ce1405d9e2cd102211. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:49:02Z), 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/COF019501219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8173d41b78bd5d754fecdc78bc5da036d8e59ff0dff3aa7e319d07ffba781668. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/COF019501222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da7b89ae7384a58f3ed1555bfa89a7aac1198071c12661fc7023adefa90820d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/COF019501216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619fb8898444d713832101f4fe88924f34692e96b0dd7f666b5d219ba6d8d931. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/COF019501228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e32c7ba04a994ec701133d084d7a18091c320e18ed5e7a33dcce751eaf03ed4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:11Z), 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/COF015500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb38bf4961fd37d1dce76ab32c435a053ec1727793bd694627ee8c9e2cebcbf6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:57:28Z), 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/COF017300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaa6f6622440ddfa8a5d3ee83b6c8ae5a60e995880d799e30cb4e4a7fc097fa. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:20:01Z), 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/COF019501223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dfb5c0ca489328cd6214665c68600530cce3a60a262703c6011a429dfe9b8c. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:55:27Z), 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/COF019400592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549a3c97f7dedb0dd1a82f89231d9d2036f38fb9b21ce0efb1f109f4ee5897f8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:56:58Z), 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/COF019501230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecef42d06cfbcb58686ee84f69814708c9f1a11d2d0d95820abcebfed584eadf. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/COF018800684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9420000fe25db2318286be464cab148502b23b0f65343d5702cf3cfa906ab8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QM6P41723041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a3b0f7c997e6ebbfbb584a1168caf924151cdbed2c6d249ada8299c60fe8fa. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM6P41723044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4421ddac76d8c5cd907b75cb3a920a71ec7cf5b7b6dc2cd282d7b0137c9b77da. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QM6P41723049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e32c7ba04a994ec701133d084d7a18091c320e18ed5e7a33dcce751eaf03ed4. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:54:09Z), 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/COF015500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb0f4af9040af110b8725a484f85f7335224903a49a92c301a6d90e9987279b. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/COF015500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d85d3cfd23deb9147b138583ef0bf4eb3c92fe7dd566920c76dc3cae110b3e. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ESA011954984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93b5b8aa0e95be57b553ececf6b37f5b2f88cfff952414c1e9d0211bbaa52c5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ESA011954987.
Duo Bowen y Villafuerte: No Sufras Corazon / Flor Marchita
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfdfe93efdb8071d55f686c7c2abaaf4dd7dd27763c4960be7e38c3250c46b6. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T18:07:18Z), 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/QZE921800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa323c241f8fcfb80073b45bb881e29f1f2fedf5e858d7349374b898f2b487aaf. 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/ESA011941231.