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 0x1936cdb082343996443c4ea3bc98a3a3a35829d6c3485820b077cf3fe268cf4a. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/018e6931-494a-444a-955b-8ec79c466f7d.json and https://artists.proofprofile.net/proofs/artist/018e6931-494a-444a-955b-8ec79c466f7d.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 0x98f55c91501e937889c4a19b0db1ef865b408b0ad239ebe5bc0e14566e79f917. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:19:37Z), 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/GBMA22431888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f929198a4c1d2fc4e6a8bb6877bf3e1d9eb5fa7e16e086a1b10338770da31f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:07Z), 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/GBMA22439825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b2e176575e9968e782ce12e61d54876009e35c3bda925a78aaf75e78fd58e6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES52230452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355f40a13263cbcb90fa77def2c50a07e47baf6b071af05ca8214b92f75530b7. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHN92215265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7a5936f8618d63425203feb0428c6a4db6e826ff6ae06d482589d8a175b494. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZRP52189728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd7f3db7217bee60b6db12970dedb6c97861c622df9f702408a06c47c9f286e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES72316507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c22c62d1b888b5e5a4bf2d2ae1665312cf56b71059daa5883df45530441a4be. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/GX53U2318785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aa952c48ebc5b8fc74cff59cb56ee829fa5f70b3f0d0bc24dda5ceae525f04. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GX53U2315201.