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 0xb9c2b0ad78f1f59230216b34bf5fd40ec2b26eeec5152880e05a615d3b5c6a79. 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/b28a7baf-c7d8-4d92-b91b-b426965ec85c.json and https://artists.proofprofile.net/proofs/artist/b28a7baf-c7d8-4d92-b91b-b426965ec85c.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 0xac4b5a27c309513ac13b26c9100245a57a021abe59d83591a9ca1915a11e046f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USBHD0600093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa696c7948ae91d100d821c793f75e5188062066c433ad869cd3cfbf3438e23. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USBHD0600170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa860ecddbb07fd4038d136fe9315f6c0612fdc6c3c3e595994c7a07f7a03a020. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USBHD0600172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406e9144d5d1dd0d716b7627258d23a573d63ff83b65ea8c1723284134c7fdf3. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/USBHD0600174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59394eace411bcecbedc5a7414a0f25c461bc92380f8e808dbc0dfcda80b2844. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USBHD0600179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe41041f1ec373b65c498ce5fe29bc0e8daee1555e29a2fc11db2f9143fa95bf. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:59:46Z), 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/USBHD0600182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351ae7cf02480aa6df5c1d08f5f599bd86043a2336fa49e3cc296db40e84b03e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USBHD0600183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f211eff45f62adfe56542febc1af5a4aef56d77cc9ad0968f73f0f29da2fcb. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:50:53Z), 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/USBHD0600184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95daaa43e0d3901c8d2f645e5e64bb03daab35320baa2b8155acb5a90f7badd. 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/USA2P0736622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81a5777abefe8a3342f29883310086f5c49639ba9dc3ff9e1d1ac568a97f356. 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/USA2P0736624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692d3a019546cb70c255237371183f24e13bdbd455a0505589a665326826d398. 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/USA2P0736626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8f90344efbd9571456c6a94380d61dd01607065e3d18c0a6fcea3319e853bf. 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/USA2P0736629.