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 0x1f6ce9aaac01c3ae3e6940f69034a47df8983380f2f7f89d3a4015a053fcc3b2. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7ae0a92-5781-4b41-899d-16ca32b5e11e.json and https://artists.proofprofile.net/proofs/artist/f7ae0a92-5781-4b41-899d-16ca32b5e11e.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 0xe4992808545bc7c8b2f61f7a77b13a21b846947c4506330cd864020178d8667c. 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/DEVI22005016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a0f5e4712ec99e294936492a8add1f1f3ad9061887df414aa814e0c7a55b48. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEVI22005015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccb61f74e6b89deeb1ee9bddee5e0c99e8ff9cfb52457da9103629ab71a7f2a. 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/DEVI22005529.
Einmal - KlangAkzent x Y.S.P. Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d9a267949042e379df5a431679080c30d5d9918ba9a9d258c67040a8c95f30. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEVI22005531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56adf3883434df1c524ef40165716f930c045df56eb9edc1e2edcbaf0cec751. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DECE72103813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0475baa0214006f529f244adbfe54c0373818a81ca8219ddb22afe1cb7a51f54. 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/DEVI22005550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae27d9aa85e2412f0cfb15702ac6cd7b75388bd4f5d5c7dbe7cfe6e11a2f48e. 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/DEVI22005551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ea0d24fd80e3ac10921d9365a07f3246b60c4838588b9014446919db343eda. 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/DEVI22005534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1193998ff7728601997e773a957256f0ed686b5b07fad91f50bb80c2b03476e0. 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/DEVI22005021.
Henkersbaum - O-Mind Remix Halloween Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9904a0b947790272eca8ff4599e3fae9630fa208c6167985943f9afabada5b43. 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/DEY372002571.
Henkersbaum - Die Genossen Fett Remix Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0749a61ddc853d990672b608850933a02836fcca7b8652503ad013f9b9a5d8. 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/DEY372002572.
Henkersbaum - O-Mind Remix Halloween Extended
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00470ccfc68cac9a051f27d9d9b00c6b12de3addc355aa5130c5c8d637af8733. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEY372002574.
Henkersbaum - Die Genossen Fett Remix Extended
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2db20e5ed1058eeb01ca314dcd57cf34e02a78a448ba4e6c47fe128271705e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEY372002575.
Zwischen zwei Stühlen - Housejunkee Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1799d93407387cdd808f09c5756eb2fdf26c12ff7b0e9def17a2ed01cdabeb3e. 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/DELJ81934333.
Zwischen zwei Stühlen - Kevin Miller Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bae826fd1860e744670a6502aa7490dd7374e91882030febe48e7868eef45c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DELJ81934334.