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 0xb54b9d151196de1319b067df95f8a0029f097e38e63dcf23d75f5c9b4fc70802. 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/b01ec392-2542-4f10-b807-4e35dc3c9822.json and https://artists.proofprofile.net/proofs/artist/b01ec392-2542-4f10-b807-4e35dc3c9822.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 0x8d7828d936b5e11eba2d417e621433ebc7e5cab0f2a112fe6707e2775e979839. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ZA61A1301511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b6494d6974695d49de6607cf4166f51ee5292a5a3bd054e7a02ef2011c4d02. 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/ZA61A1301512.
America / Desire / Long Fellow Serenade / Craclin' Rosie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831f150bbc49d7b20219dd2525f29687c85fa316b9fe10337ad0b31a1319b28a. 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/ZA61A1301507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89246d2a654a7848cf8535f04622db080e63d27cef6388a5e6c90018c26b74b3. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/ZA61A1301912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb464fe3a8c76c1fa506cf31c8c6fdc060121dcdaeda950605446b178d974c3. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ZA61A1301922.
Salute the Legends: The Collection (Demis Roussos & Joe Dolan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f6bae12575a579cabdac3516f65bec3d7a14ee24097cdc774610a238b0418f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USHM91657569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c84009875f641e73f706663bbe0edfa5b9dc3c7a70c66c76a8eae18584442e. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USHM91657574.
Salute the Legends: The Collection (Smokie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ce4fb8c7203695aaaa695e58b84b9428cabb7cacbce5284be1c98bea8cad59. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/USHM91657513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb892de8b9fa7695a1cea7e3ee1f3382c54c1b90e6456256853b8b9471db11474. 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/USHM91657514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baf843146035ee779a208afcf2f15eb50dd89594a6ed8209f330fe93099eb8e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USHM91657520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a9c577cd8cc09545784a709de2ef71c76c8da49c7853dc58dd5c2cdb2cd804. 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/ZA61A1405889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeff4eac1c2c9f6fbf27b2d218b551913cd55546b0ed7d83a5a2fc2ca85b63db. 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/ZA61A1405890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf6665873b335db790a408b7c1f9bf2abb27054beaa1c5976599376fe6995f4. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/ZAO861600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95409be07046b01f4a3df58334220b714f5b8702c59f7ce132f409db57db2cab. 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/ZAO861600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cde9cf53c706bcbc962def94c5e3e10701827cd033722747e21561ec578d593. 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/ZAO861600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fc7c188b79bae4341c773700f465d2def0565eea78c57e8d8c921da8b4070d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ZAO861600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a39792d6b3ee2065a1253b0b352c3f23ec4b44d68476237bd1a69b7c5ad879f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ZAO861600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e961360c4918ab836a409153b60d4faa8d904ff3f4bb8b62a254d44efdd65a5. 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/ZAO861900171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d81b93102473ab652adf50df4c7fc60e9983ddef310518f57ad081954f6794c. 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/ZAO861900231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0553be34dc93d95276ea6388430fd123d15f142a5959cc6920dc7c7376f6d9d0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ZAO861900292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1a1c954a130c16ecbec767bea6edfe3fe7d2d5ca0fa7ae24f042db48d7bef5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ZA34K2200820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2516782d0747c4e768e693d3ad5054ef33f35001ec9d5bbad1ab6f68ae9fb198. 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/QMVRR1501033.