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 0x9e3b55b70c0967688155e4017825c36508824465dfae3ce8482815b3a94de731. 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/7708c630-0c52-449f-a274-a1b9bc950e16.json and https://artists.proofprofile.net/proofs/artist/7708c630-0c52-449f-a274-a1b9bc950e16.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 0x7086dc31226807c6b534dfe3d344c8b267984a3d59143065d44f5ef58f945495. 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/NLS202400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccb3e8060a5698ecacc6944945b6092eac59ab8ba19ad82084b504519ae9e4b. 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/NLS202400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab0c40f0769a1474fc504ad6273e01165a7ee07c47b8a310ec712a56594c64f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLS202400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c439226d867adf05cf19a641e5bb961e14165ef8d3f9f24111e994133538962. 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/NLS202400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009e608f752362af4f731a97c4c135c677aaafc0fca57c19b2000a18f470231a. 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/NLS202400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc1b09ce2eca6a25e0ebabb50afe8a82ab6444cc239d9e468e037799e7a98c7. 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/NLS202400089.
The End Of The Beginning - Thunderdome Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fe1a190a3753186d8889cd7e568066fda94524705f3f6b0a629f016a6d4859. 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/NLS202400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0e8a81bd692428719007d44513a8a8f72385613a93119f7269fb7b6b5c5e18. 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/NLS202400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867761f01f0ca129394a85d3142dff4c9db6ff56ed59bebf738ae04d4a227c5c. 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/NLS202400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00ae9bbe41576c99e35dfcd6f44af7d54253dce6ff3d47a00082cd4aa6fda8d. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/NLS202400072.
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 0x3739a37b7d9e0d3de932558b7edab41a1d7269cbfa0857e646fb2211ec70c5f3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLS202400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c579b281b5c7c80cd9d0b7d19a5d52ecdd72617dbaafa1cbd9188edacfd7269. 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/NLS202400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a044008a99f5e118ce65ff586aface2db67f37e91550b12bb293a9a502fa6bc. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NLS202400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a96aaa7bdf73a9fa91eb6bb8a6e5d3a279da1dd6102d054c59a684983d30bf. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/NLS202400092.
We Got The Juice - The Giz & Darkies '97 Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8728b6236bbf3676935f069b8a299d59a8169f29ed1eba66fb75d002c70ec8e9. 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/NLS241203201.
Hardcore Classics Collection Volume 1 (Mixed Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ffaf45600588d33820f06095b19d09b80d0fc1d9193ab9f4e608f553e789d1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:53:20Z), 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/NLS241400115.