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 0xe122fb3a36115030aca6830c7f3d41b2c8670c233f07f9668afdc06281707b40. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4591ce35-6c38-403e-b14c-8f3069ff68c2.json and https://artists.proofprofile.net/proofs/artist/4591ce35-6c38-403e-b14c-8f3069ff68c2.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 0x9e1c2fbc9a4401dcfe229fce0952eabb909b6a6c9eb05555159b4391b719e928. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/MX3581100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba36c18a408fda58106b6b0416eaedc46ca4781f3f6e3841a1046a0a0b79553d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/MX3581100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bd254bbf2c593b8a2ddc372b9248379d2eb667a5e0f26bed417f2b5bde7f94. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/MX3581100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b775891560899d849125952c64c6831a17f47bd1dd7c4300605271f349740e9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/MX3581100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a432c0790b0dfdea49d280c933d6f657c95de2967d1b45eeaa4665310198ba. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/MX3581100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d67cb1f2582bc99188b7463825df3971b41c03a25ea73bcbafce1ffc0de846. 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/MX3581100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ac9227909c96107b0befdc190eefbc8bea74f72f29f3dee387aa2ac3604617. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:30:34Z), 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/MX3581100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf230d79a08fa68255af4511a4672e50573b7fab3e6170c5b2b37cc6a344a544d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/MX3581100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d760889b7476606f42c34482e5d03b84f599b8d7311446b992a7e6b6b5e5c9b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/MX3581100060.