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 0x562321b6cc92a587854cd6d9ac19bf44a1c1a6ba9d52ed4cdc501919bdb9b45d. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c16f5a6-4699-4cf4-a9e4-56b0245dbd9f.json and https://artists.proofprofile.net/proofs/artist/2c16f5a6-4699-4cf4-a9e4-56b0245dbd9f.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 0x0ddbb11d28054cc1180ee6e5d1770e4f635fa8e401e1c8d145479bec6ce65dfb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USLZJ2365813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349c28c00451029e6f9ede11b2bb327ac8ea14ddbe7c1957071a8f316509f05a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTV32313438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471d837f71d3ed93bb6fbbb1feceb8fe40d1999067482d8af65b4da8e32c2195. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:34:12Z), 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/QZTV32384571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980ff2242576e933c348a80ff96d6ff65f93fe4aa234839ec8b7a14129360cf0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:43:21Z), 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/QZWDD2384267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0a6e08fd26d4ef6f59f4d21c2762adb894fd7e7d13db3d09a5a4e6a5f31e1c. 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/QZ5FN2417834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1056f5ba26f0ef25ee53b2ad1ae65b6b67d7560e9311135462f625a819857c4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USLZJ2417036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe575ed8adc217240b19448651e6a7ec4acfe334bd9bb1bcfb15cc5867056e4aa. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ7M2471577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded853bec00605a78167e955c760b37179fbd7e09209820b0879262ce2c917b3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ72592698.