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 0x6dd3bad84f40cc595f8bdb522c629fb42aa5c68e0624cf5c730e9a188f623781. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b3c51cc-dd3f-40ea-9ed5-88e676a438c7.json and https://artists.proofprofile.net/proofs/artist/2b3c51cc-dd3f-40ea-9ed5-88e676a438c7.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 0x2e6428d61f45f8f826f38aec8a197a493af197325e9bf9ff05caa2459e2b54da. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:35:16Z), 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/QZK6F2035013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7eb982f650e5bbc145b90d2b2a237477744874d4c59e6856145a688d493561. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:20Z), 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/QT3EZ2460943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c826bc9f7861daa04ab4fa3b703f81960b7da0d6d5ac3aa19447d1dc3ee20b4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFYZ2535497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bfce05bcfef4e18eeb6631e64fb9f6d333beee771200c529ccc4cbb7cf5c76. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES62502536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747e864c708a23077e570a95074bbbc9222d15efe14e7c8d835b69663bbfecb2. 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/QZHNB2509145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d1ac0ad6349e9a589ffecc98cb85536434bdbcec15917d36bfbab84e7fb79d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMEQ2550174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee920f55877082a10e215f4ef828ee48bd4deabf317566bbb1bbb5512f4ae5e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBD2558087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b26a4ad6d8e689b06a2e5cb7df568ba2c2c7b2e5633b9432351d6dd9937f38. 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/USHM22212726.