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 0xfd73b794e17e5b70508d435bf2cba8b95f964120fe4df1b2502d6c84d79d98ef. 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/f64482f9-f179-453f-8786-e0a2b41ee92a.json and https://artists.proofprofile.net/proofs/artist/f64482f9-f179-453f-8786-e0a2b41ee92a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Passion Lounge, Vol. 2 - Emotional & Sensual Grooves (Compiled by Henri Kohn)
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 0xf0613e0d972c6f6b9ab289973e173e9cdc308aef576aa1d42cecb394ef758355. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/DEU231500571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4db25bf0fc636651353da76c283372851de68582755027fec2fae568818d61. 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/DEU231500572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc137b6eeef0a3dd7241775fd19bbf7a6b1efeba912777c406843271d8681c49d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEU231500573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90408adb50bc601e73bb8f566f2021b93641677a391909144b0d8ba350f74d11. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEU231500574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e2e0683624830c35a011cc42440c87e134b3c851d8abf521984881814e158a. 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/DEU231500575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf586d692d50de282d4673d2c078c2e4e952d612450578cec9234dd80fccccce6. 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/DEU231500576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da71b5f3761ac9ac8338666a758d726b68479046013ff0fdb94c57a4da83986. 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/DEU231500577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238432cf73507a3dea40ea6f3905ac8836db077475361f8a4e72714b5049d2b1. 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/DEZ010400327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e9ee16d657b63c633e1401bb11f835ceb2ec0203e9740b2db1dac2ca4bf676. 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/DEU231500578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459d99f97787feb8b319a11f077d963faf0fa041514fe398cdf370967bc246c7. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/DEU231500579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50b82b29f80a6b4f9c2a1627b26347a52ae2dcfb96b304af1fc453bfcc8f9d7. 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/DEU231500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e496334baecd06287fa5b03bf0ac61a06812d5754b4042690a57a3dbefac6b0. 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/DEU231500581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff970e0005b887b6f89bca37d1d414f40156aa61deddcc6d83df80481d103a8. 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/ITI020600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3312d770096bb7de85a536d12ec75f3106f523134b9d9073d983fd6a3a546a9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEDR30700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb8cf62b29283cb81579ff1d8922242d291003a3b4cbfa132795b065bfe6491. 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/DEU231500582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356da4a5edce15277212b76e2d9f1f3a92a9769e310979e6e851e75d0d73bb57. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEU231500583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6aefbeed7cf21732371a14de8938d51cb3866b217650d082e1bc15fb25e50bc. 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/DEU231500584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7228f5f0a15eae13dc77d80288ec7a37ece7be1bd207067b4c2a9b95830d5c18. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEU231500585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f5a9d6a169891b5f61222aecbaf9381530b412737d3ac76e302941bf94de3d. 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/ITO170700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98929127df71601a5ccf3de7a0326a61177592230838c3af872aaa3bfe7ee53f. 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/GBLMR0500004.
A Drawer Full of Deep House, Vol. 4 (23 Real House Tracks Compiled by Henri Kohn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15616505e39d148c6f29a7d59573b3558a15e011a7264f509d500934941a55db. 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/DEU231201330.
A Drawer Full of Deep House, Vol. 6 (24 Real House Tracks Compiled by Henri Kohn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9702243c158d26f6cc70915e8fbbaea1fd5610ad6434cbd7b6de4edc13b4914. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEU231701555.