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 0xbf736ad5cb3c26e2dbe7518cdfb7be979e378553184404bfcdf54fd6d052018f. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e694e25-0e64-47e7-ad58-78ee546c254d.json and https://artists.proofprofile.net/proofs/artist/1e694e25-0e64-47e7-ad58-78ee546c254d.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 0xca68aa7c16b60f1e0c35776a3dd191ff37c9c557178194d8369f283c4b4a63d6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USCGH2268041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5955552caa5d21f2f5f2ab320c2636630fbeefe72b8fcc96e63a7d4f668592. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:06Z), 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/USDY42412216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585275ce0f74b87a75c449dc6d13e1f127f2bfe21712adc8be5e214de6441abb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM22495601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77a2a381b7c607dc95ff9d6f8490690afef9642ad2349fb3de895b74730cbc4. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:29:48Z), 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/USHM22495602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5bbfdb5e0f7b0669a724d666ec2ba6f09e9dc676fe42e1b5cc96f435a1c408. 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/USHM22495603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f8ca42e0856be3aafbc266ab120511aace26cb2543a2bd3047304083bcb364. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USHM22449250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa4740d8a22a94e830e1e5391d71fdce92cbe35f93e3284803e7701125b230d. 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/USHM22495604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa779ff698e6470c2610debc196ed899281b0fd1d4318cb2052b7414f5554d3. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:49:59Z), 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/AUGBT2503932.