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 0xcbf8782270db2fa58801a60ef767727a1d78abaa10b7656bc09de91b86bc334c. 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/eeec67b9-2353-4ed0-b715-4a88cef80b35.json and https://artists.proofprofile.net/proofs/artist/eeec67b9-2353-4ed0-b715-4a88cef80b35.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 0x045e6c34e61958e0f9d9f2a2fff62a277e95eedd95ccf7250f47609c7df36d15. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB8KE2157495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb4a0e99814a6c5268fce990ce9c1393710a512049ad9da885eaf837f543dac. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZAKB2290399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adc9a0bf2309ccf7ffdc2888d6eeede14ad3dc425c0854e3a86f5ae4d5176ef. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL9KQ2390140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cd34fe8d965bb3604ead51b63dd9a55d5cb26ea48b4b524e3523f015ec098f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB72283853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04539e1d49f754cd5a401513c7b7481be77ad145d204f917410d7484244e973. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAGB2265655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c0ec5094b501f70135cafbc279aac6faee6503a1f3cc05f46c3cd1e6a566d9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFP2135304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd1400fb66a3425787e6dd314de8233f2a7d2484ef5960a56f24086ae5c7f59. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ATEK02077116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468a66eba27c9879bfd7e652835612b99fd1fd7d5f91cafef590c49d71917758. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEN1926094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e0ae8b45d309f3ae3ec5378afa3a3ead51b08978833286597d175a78c0ecef. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZHN61996362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa22b4f30f539007bcda3ea19923994616160be98a74bbdf8838a097446186d6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES91978427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad2cc0a131aea52ccf2fe2a3af8a29989c44971017476868c4a0002d25c8996. 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/ROUM72500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab58fa1121d7236e64531ca8896b8343a197f14ba66847039dc41f1204f51db. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ATJ002400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c0f03b96ee51324175ad1db03aed5cda792274ec925c157b2725d8d80beae7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ATJ002400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c0f03b96ee51324175ad1db03aed5cda792274ec925c157b2725d8d80beae7. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ATJ002400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a710941307a9315188e28a9fc6a6f65737d44f5137ce6065166f5e9a7d3b20. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2491033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2187c234c12b50c8219c4ae648354783f83f4cfb758b55652f4e39a630983995. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWDE2252686.