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 0xe624b5492933641061994d478e68c55d9031dd7decbedc7e15f0322e28ca1c8d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/738508aa-839c-4994-905f-3c3085415002.json and https://artists.proofprofile.net/proofs/artist/738508aa-839c-4994-905f-3c3085415002.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 0x525d41d2827a474a67c7fb9cf75a6706ea264706316438795d3ed03e63d0f52a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7K2420923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e8b0e851078fa5b0bd357d4d22be2029a7b40abfdf7414c1e6e32999099e2e. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:48:25Z), 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/QZZ7K2420925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05867e2116d6445736994c82e3b36eebab87bd2b2fd162688560474c406150bf. 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/QZZ7K2420926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a65bc85057dbbe1718a36b9eceff3fbcb741eb06eac52501fee2e0191875afa. 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/QZZ7N2401884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3749fe46561c382d1e67a68267d1fa64fca59da6f5177861352aee67e85f6815. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:34:56Z), 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/QZZ7W2404976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bfe5ada7cf48f29136d9eb7228c4dff5cca3e6a70a7b5e4353ca78de73683e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:04:13Z), 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/QZFZ72546156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b19e0019eefcbec3342ffb4337424ccd008ca8d4556abf5cb77f4ea0f46bd75. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:47Z), 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/QZFZ72546157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751012fabb24f06549060973084c4e045c4ebaaa2dd56ee05ef6418a11c5bcaf. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFZ72546158.