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 0xaa3cd25c2f4c5ceb49274fe430b79c8f3da7908b57536cb5386ae257cb71d2c2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e068484-9f43-4072-8bc9-2d846a2b7bc4.json and https://artists.proofprofile.net/proofs/artist/5e068484-9f43-4072-8bc9-2d846a2b7bc4.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 0x57808c15dca97a08a00349fde278df3fc9251a3438b969bf361fff2ae0e4cd21. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEU601706824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528c46c2fd2c7c0afd7dde0834fd60547e12d38f15d32e68a50bea052e5b816e. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEU601707413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012864f24fd701be7ed8ec8eadbcf6557b569ba59b66353c962b8d590f0ebe78. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:23:48Z), 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/DEU601707416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e63f77996bbb478aa17cacfe99a52f72d67a98d860f1c9d8bc97f5b2eaf9754. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEU601707422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81ca696d07dbd1d59842578df8d8497f2a9650e0487bd2a0cdde5c2026b4579. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:05:25Z), 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/DEU602210190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bd226d1f3e5bf7ec84fb2ea41e10a46328e0ae17f7d3888114b6a71086cd11. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/DEU602210192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890b31f1f31f49815c314d8f342ed0d3f31fed0d18d8f9c56a427f020f29ba19. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DEU602210193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ca65b3ab0aa3f1c5e1b646e97fb4971a7b42d8458986ea317878f72f8224d6. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/DEU602210194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dca53a4488dc4b7a04a35263f25efdb1521f3dbf4aeaa28c6f85219e5f76c9. 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/DEU602210195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edfbfe55a386e6b7e1023fc407ac3d8b62b9ffb5451e9ac87393fbd742dc40f. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEU602210196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022e310df80bcf4a5204521c3043e8315b2dfa4911f6c4e421774a260cf459e7. 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/DEU602210197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0cdfceb460e8546067c747e4e15a4cb44d66636643d9ab61556d556efac11e. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:22:51Z), 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/DEU602210198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0633fd61e1b4cc23ed69300d4f4a3b599765f411c4850273ea836607cbcb4678. 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/DEU602210199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4c66267367ef50b45f3287c579b232457ba8a65ad7c39e06cb957f0fbad51c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:33:49Z), 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/DEU602210200.