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 0xc3e04f00a7e8f955c9f4be8dde1acab093d0ec0257372ef237c1f85e132e9a74. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6371c12a-e926-47ff-9538-91191caabc6d.json and https://artists.proofprofile.net/proofs/artist/6371c12a-e926-47ff-9538-91191caabc6d.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 0x3aee2df28273682494d214a9c092c50f3e7badaec65b31c2ebcbb29dab5c1fcb. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:27:26Z), 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/QMBZ92473369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba6035a6a2ef8ca4abaaf700c4c3a0b144dc3a74385a861d818a65c1d087ead. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMDA72431328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bef8750edc1fd28f39f672d0412b5a1d292848599238d01863d66ca9e7564c. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QMFME2468886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a3d2c518cd086fabc16e38c7032b2b99b69c7d8f8075a2e897263367d108d3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:59:35Z), 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/QM6N22432864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bef8750edc1fd28f39f672d0412b5a1d292848599238d01863d66ca9e7564c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:59:31Z), 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/QMFME2468886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a3d2c518cd086fabc16e38c7032b2b99b69c7d8f8075a2e897263367d108d3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6N22432864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c32950a87a784ca11d73572e50719a4b09a15da69fa847c2d1c6fadbc43961. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QM6MZ2424772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bac9fe42b97d0289572ef8a7a21e3ba6eb1823b91709e1dc365b4292ac5d83. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QM7282403952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba6035a6a2ef8ca4abaaf700c4c3a0b144dc3a74385a861d818a65c1d087ead. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QMDA72431328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bef8750edc1fd28f39f672d0412b5a1d292848599238d01863d66ca9e7564c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QMFME2468886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aee2df28273682494d214a9c092c50f3e7badaec65b31c2ebcbb29dab5c1fcb. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QMBZ92473369.