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 0x4dab42ab3bf258c63fce76a95d008898fbb8b8b8ebbc709f2ba3e2dea80f7946. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/774d746d-2926-4b71-b8a1-e6224aad81d6.json and https://artists.proofprofile.net/proofs/artist/774d746d-2926-4b71-b8a1-e6224aad81d6.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 0x1f87e9fb8120616882038ed7acf143659aa081796468271cf4c50b5f148f6580. 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/BCPOD2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2169359a4878987397edd33205c3537f9e5c9500be24f02c933396492974285b. 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/BCPOD2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18d5af9f7c6ac0047a3e38f6246b883eea18407925ba274693566479e4390d1. 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/BCPOD2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1dce894c83cb9a42902c40567208b15e885baefbe6e06aaba3ee67ec79a8d2. 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/BCPOD2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd613e8c030d4d43e15dd10cc3b811cffdb0a95bec0102b038ebd3c8e6f24055. 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/BCPOD2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e97a8dbece36e6805a372bcd4eca7e7f6624a6862f42697d65f4f1662317a7. 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/BCPOD2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf000ee77f550adf673b9ec4d842e5775b9af6fd357e1e85f0c2d5d2cd201e608. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/BCPOD2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf9986fc0e6e7fc4097785521b03f64a09ee396fc9097ec72b70ceca4f2d6df. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/BCPOD2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf9986fc0e6e7fc4097785521b03f64a09ee396fc9097ec72b70ceca4f2d6df. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:12:00Z), 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/BCPOD2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14945e367002684fe0fe240d3a2b8c0c54a1ce397dd3a8f1420c01f2daf091b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BCPOD2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b98aa4445f7eac9e17027049c98d10e3e955843a8f3a2d125fd7879589b4b74. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T11:00:16Z), 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/BCPOD2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c596b75891cfabf04277fe6e9cb02cf66820417f30e1151101f2704258e23e9. 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/BCPOD2500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff8622de28aff29438fa188e37d08ff35dc084894066f5afb277ff01ff19d22. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZTVM2473568.