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 0xd50b886086659ffffdcfa5245455589df430032f5bf0918a22369cc34d8dd9bd. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf6280fe-71b5-4335-a9c8-f3c437d54073.json and https://artists.proofprofile.net/proofs/artist/cf6280fe-71b5-4335-a9c8-f3c437d54073.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 0xe657bcbac470a073a01f415ad06df33d805ec118ceff3a47faf84a56ada04db3. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:04:30Z), 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/QM4DW1794765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafaffaa66fee5c31e63ca015dd4d67c49dd0aa7cc638a97633a52245d620f3f6. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ792470252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb164aa40c535a488c8f654f73e7c74008b01537ff22b9878406e6a4a82a267d. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZFYZ2597919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafaffaa66fee5c31e63ca015dd4d67c49dd0aa7cc638a97633a52245d620f3f6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZZ792470252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a67beb360188728b24c1624a4b0591d48fde67af8fe6e9e8896425388e6c32e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFYZ2597920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d9ffcbac47b6994d852d93b6dae0d5f703c9d4b15dc4f82814d2416a6115d5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFYZ2597922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410510228d2822e1d35907dd6ba8ea047f0fb28233843371e15198ba8cd127d5. 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/QZFYZ2597923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cd42a8819518158ba6323ab3284ff23749c060821b5d03658b313142ad5794. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFYZ2597924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bf7282c6bef8cba894017b6ca1f5bd6cf9fe0f93eb9666caf4ca087a16228c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:30Z), 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/QZFYZ2597925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7ae67857e0708a823bdc7822d1799d9b8a3ea3ad3941794715eb7ac1c9947c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZFYZ2597926.