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 0x911799e60ae01392ca015f864ebbb0235384e4f1b76dbf965e93de4f953bb660. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13167c17-455a-470e-8e87-735fc68ec3b1.json and https://artists.proofprofile.net/proofs/artist/13167c17-455a-470e-8e87-735fc68ec3b1.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 0xd9c137933459b08d08a76d43a8a4163fc5e8dc1c1f4f4047ba63bcbf1c434056. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM9A91626148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab66783fa8d08e2290af0c3eb746c8ba68f2fc8cd5fdda9c5690be4f55d392fe. 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/QM6MZ2353538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb6916d31d7155fc04e4c39e8f65cb4d98032d13760f5272c1e8dd758b16134. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QM6N22355847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d732aeab9b24e8762b0bdc97ab9e9b4ea0643480f0b632624c352d4ee8516c. 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/CALVP2490176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf060cebe3d94524803775bc81c77d5c926214a128d022cf78c22c69a1dc3716e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:18:41Z), 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/CBF8B2400293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf9f2ea86baa9f267780d92b81deb02dafc8e87b94c51445756511e4a684199. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CBF8B2417473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904ec02e431f65faf6084af0a3498b30b341ee886cb42a75cc3afb455bb708f0. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:23:12Z), 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/QZPYN2518138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd909d6584210764005632e30b7ed04ce4e7cf60c53e5a39cfffd10366afae91c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZPYN2524064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef7097f776ed26f69663fddd6b09781d53e3572eaa4b404096ee16465f7e7a9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:01Z), 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/QZPYN2527937.