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 0x2d518d8e0d1b61d0c1ed9287164d90c0b95521f29b7fc0dbdf9eacfcbe3b4e56. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65a4b87e-6bde-47df-9d9f-6801df10870b.json and https://artists.proofprofile.net/proofs/artist/65a4b87e-6bde-47df-9d9f-6801df10870b.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 0x6698c0f8c0a9c6f8b5a12d96d82e76695e0d688631784a84656621824ff1e95d. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/IT7KF2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f74247d9c4ff8ce1bfbefac4b034892454e7b64f549ded0ccedd267c2dfc008. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/IT7KF2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5ddc9f37bb91995f2a82625cc3c19601ce98d23d33c721fe5b5d3ca5052c5a. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/IT7KF2200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f25f2f443daed9ad10c98cb9d491105cf746cd2612895098d2daceb5fa674c. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/IT7KF2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840edf2badfbc9cbd5f14feeb56fc64106d0b48a2a7605e30649374b840ff8f5. 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/IT7KF2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad242e855dda2943a3d04bb8b62efb5132624ac1d6d311b9cc11694731960cc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IT7KF2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03da3589e43d1dfb4676345eff02292242a489f5de286ea22942f12603786a35. 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/IT7KF2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4b9495b3f1ca2b6ba8d436ed7f8621ef66a86a84fa3d72e05a77afd68668e7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:09:00Z), 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/IT7KF2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c4ccbaeb7b5398dc24f9877234666fc6e39e2ab94b89b8cd960cf33ef91cb8. 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/TCADJ1730661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a3f677175ce6315c42c7c965532e76bd6148bd7bddef6cedc76f1a12b49446. 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/ITB551312240.