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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8d7826efc4c0d31ee58d5210544b7658b93e82b53b543d428f5187f1f7d149. 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/dbbd3c00-67b8-44ed-b957-d6a977f97c3b.json and https://artists.proofprofile.net/proofs/artist/dbbd3c00-67b8-44ed-b957-d6a977f97c3b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7584afb6508085a558c50921d3e1364ae4c1d64c1cf4e5723abb11e5c7711b4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DECG30900191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5322ce06cd79ea2a7fbcab0621a533fb8047b84ece681d480a4b3e1cabe1b459. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEZ470400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4c76ed0260ed3e35a039739f7875303c442efbb164e7f3e04bf8e6c5b77bc2. 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/DEZ470500330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbedda3e02a6258b7715cc02d74bee8095ad6d553d29e67d7128d38d5fb33298. 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/DEZ470800827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbedda3e02a6258b7715cc02d74bee8095ad6d553d29e67d7128d38d5fb33298. 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/DEZ470800827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fdbe48707a4b07c940b7b9a53748059e2bc3e47b3c4dae0185fa20a9c3d8a7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ121536219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29abe016e24f0ec54f6fcd45b17cb2bc0c92fbf055045e2925deb38bb566ea8d. 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/DESO41400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e272bddced4dcf7f5472d627f64e3a60c66432a10ca9f04d77bfab8c40a0540. 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/DEQ121112530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfd2ca0962dc33bbc078f3f8794e4e56b0095cf380cf5fb5ba467d05f702d5e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEZ470800726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0143f57851d6c3957492bac938fdeab6a0f63eb3cfaa7dfc1fff2bc15672d6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZ470700497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4786f13bfad5de4ba53d1f9c47ec4074580a1b67e0407b12a382efef6c531480. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZ470600423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48216da601d43aef40cee03d9c585f5ec18332ced74cf590c470c5baee70c947. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEZ470500301.
Willkommen in Berlin (feat. Sido, B-Tight, G-Hot, Tony D, Harris, Shizoe, MC Bogy, Frauenarzt, Megaloh)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2887558b4c534bbf1bcf71659f38bbcd61b83ffec66bc4cda0af5f00a9e9d051. 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/DEZ470500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd523842093d742e496640cf9db676502d73b1d975dcd117438e32761c60e1709. 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/DEZ472000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97daa5a48e7b4c5264508b2926a30ec4a02863906c9937339fbca841efb9e570. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/CH7812214252.
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