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 0xe52174aeda8dfce8ed3769848a5aed99dc5b43591df0392196005321ca8a1aed. Chain 2 (Bitcoin): anchored in block 953721 (2026-06-15T01:12:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a914c6f-facf-4f3c-a2a8-30ccf5dc16a6.json and https://artists.proofprofile.net/proofs/artist/8a914c6f-facf-4f3c-a2a8-30ccf5dc16a6.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 0x6ca1513853e311dca68014edbdcac87d916f0e3636307b3a556564d0c74d9242. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:39:46Z), 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/QZZ8A2537508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c06f52640d1c029b5a987e601e5e086af137b8e3a9020e97250c2ce1b52e3b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ8A2537520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551ebe6ac486f19eff4286e561aea61656d53958cedd8de747ddf19246694a1a. 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/QZZ8A2537523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c66a5e1f08da2073003b3a98d699a10277896521ea3b5ac54ee02045cafeae3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ8A2537548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55eaa491ffd29926bcfa16b4f40dda01042944ee5ae62f232df9481acbbf02f1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ8A2537556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b032857e59eb2dde86daad9d677bce4d4720c33c9f513cda3979f7444cbe3e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ8A2537563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da5d006a2419ac656a4d7fecc7864bdabc445fb9a855645ad9f1a1b6b304bc5. 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/QZZ8A2537576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1801b9c6b151e189645ca6bb300856267cda4f738ccfb7f3769cd6a1d1e9c8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ8A2537580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03673151dae994e0674d00dca878e7b428e6a42a09338c8ff336bc7c7f47c3c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ8A2537583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd641cbb6f900ba6ac13fe4576da16617c89b672eb1004085e0d140d1137c355e. 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/QZZ8A2537585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c18b0e0534ed1b4eaa0e6179e8049e272a16a811d69afd9fbf2491f737783d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ8A2537591.