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 0xa8b08c11cee77f597d8006f3caf71bb44c31750a7638fd95c898491d8d7d4f5a. 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/a1b069c1-6a72-44d0-af35-1724f92b73f3.json and https://artists.proofprofile.net/proofs/artist/a1b069c1-6a72-44d0-af35-1724f92b73f3.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 0x0a676be4bf8d68df732da5519ae2f4df727958139104ae3d75b6daa0b0954029. 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/QZNN22225117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb56f4e040cadb9bfaf39b9b4cf23d420ddb17066155b2378fa61014fc3b5864. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNN22225118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8299a542f16cf78763fc2229d332fb6e7ac129912885deacaf2e3014b87344e6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKZGC2304887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd920371a6555ed8871aa3f892497eb138e0369274657a85be2faba4b5274d840. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKZGC2307155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe56327108bbc86b68ed40566fb3fd65bb41cbdf6e3f7cbf3c381498e274d88e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKZGC2307156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e72e0ca8a92e409bc7318084ed93d89a08dbbb2bf3d1f11aaee975513f503c9. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/UKZGC2306099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde94ccca4b322e4e068ea5e3fc36d228d9edd62240b227f7f58ede0ccc8ca346. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKZGC2308434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3d2293db81cbc40281ba1f82948855503486650c7ed643b1894750b411f2c8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:35Z), 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/UKZGC2401683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a7deab69d24aff4ecd062b08d8d2aa1efbbf3ef8e2706abd7c571da09a4e85. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CA5KR2526785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68aeee22def321ece05d7a3365c95a046e536eaee82a58cd4a30fbcaa510650. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:15:46Z), 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/QZZ7T2515004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21824fd762dc6fa4b07861d28278a57c9cdde2d92ee5b67d76e83a07d120e681. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:47:43Z), 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/QZZ7T2524390.