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 0x791b9d46a67ac34145dc796bdfa7437396ded0fe1989a3e1cd66b968e7219252. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca7ed1f3-4143-4bb0-be8f-7862f10b9d4b.json and https://artists.proofprofile.net/proofs/artist/ca7ed1f3-4143-4bb0-be8f-7862f10b9d4b.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 0xf4a07f278d28b1938fe7943090c50e1f0397e7f7c2356126404ef7cc2cba1d0c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ZA4PM1900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df65525053aaf7951246cd48546366f8cae1c1b636efc6a5144a2b920fedd79. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ZA4PM2000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418a0fb54982bab2b32ba1075c882a2dfea8ce81af87abf76c1e5be6915a43e0. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:21:12Z), 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/ZA4PM2000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183e7f0720c36cec1cff2f5dd44937ed1dc87a54708b21c622a9d6bc98f4708a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ZA4PN2000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd79282043ebdf1833655e772bf054e4899f188a13b2d9307f82ca3e52ae49cf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZA4PM2100218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc745d9fc51c4c09caf44406c150f9e2b14178f4f560092c30b046c4b6f68dc77. 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/ZA4PM2100212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbe6b03ccd018cd08af3c314b184f546fac4ee2d21a1a859d766e8565fa75c7. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:40:39Z), 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/ZA4PM2100213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6a04e16ac20aa67ee8050e426044e2a72615e299ee96bc25476babbae83772. 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/ZA4PM2100214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91943f68165346b385097fae199d4227a0a19bc6ddaa18ceb6455b602d34ce7. 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/ZA4PM2100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc6db4b142c97911dc3f98edaacd162a8841cecc1cb6590ee8e66811dfd0fbe. 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/ZA4PM2100216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd79282043ebdf1833655e772bf054e4899f188a13b2d9307f82ca3e52ae49cf. 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/ZA4PM2100218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedd16c097a06900cab1da8be32ddf5969d91b63b2cff99d22cd0792f1fa44c6. 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/ZA4PM2100221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd584a5f81d01466301e71305669f68ff9d47dcd6c8370df16ed80931881c86ec. 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/ZA4PM2100223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b72a20e0582d367cee14001fa1708a151844a7380a5e4f05cc86c4e54718cd. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ZA4PM2200520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d56cb46860f5bcbcb9691771c5a4c0b54b36761ba5a10b640f3735d180074a1. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:15:12Z), 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/QM7282381048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114bf4b61a6a497af7370b2007df716fa7970076f4d6acbe5bd8357108bc671b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZA56E2416231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389a0ebb3ce41d6d37f5282f134309e8a989834623e6fa4877319c3252eab791. 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/ZA56E2416238.
Captein (feat. Springle, Tracy, Nkulee501 & Malemon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd75a80e7b2ecabafa92cb87a12853c25835dfd3eb40edd1744a6a05b6d69576. 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/ZA56E2416239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987ca53b7f98df6f6647702e591cb2efb5ea065c723c02f9a6a50c551053acf6. 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/ZA56E2416240.
Stuff Sama Grootman (feat. Malemon & Mdu a.k.a TRP)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd543360b69d617841bf6c2661083e0e4ef82e715dc287f1404805df906a23097. 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/ZA56E2416243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d55ebe616115cdddfbf40803e6bf1b255bd0ea758bac359b4bd3583b07c054e. 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/ZA56E2416244.
Tata'Poyisa (feat. Mashudu, Tracy, Mdu a.k.a TRP & Mpho Spizzy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd110f04448df8c3bb9d2afe748f130e0d751f0a97202cbf9946a2dbef248a8ab. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ZA56E2416245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e422b7e7c1a7d50b32f39bd820533f4f891d684551b839af26537769cf5df9a. 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/ZA56E2416248.
Cheese Melrose (feat. Semi Tee, Ma Lemon & Kammu Dee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f298dd3d6ecd3482c212e614fe1180cb5b546e6c465a9c914978ef435359b0. 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/ZB1OS2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93afbc0b5b6bb676351375ddb4072f3f9253a69e22b811e04136fae8684a040b. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/ZAUM72002135.