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 0x741d6ea181856fc4a3a6b95b6f0c347f11e2d693ffb1f8d70218f2ba18676a7d. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f3a6b24-95a3-4f86-b0c4-1897b14cd508.json and https://artists.proofprofile.net/proofs/artist/5f3a6b24-95a3-4f86-b0c4-1897b14cd508.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 0xbc42a963e330f337a3b02d33fb6d8581189b8e3d3b04157049cbeb2e151b25ce. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US3DF2471162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6173a1c14428a9edb8d8bb97f4f89898bd8be50e61ce3c09559d52e6d3d0cf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRX872432266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8613f33f5e1a1ffde08219b0681fa4a6fba269a38f3841592c402b37a9f9e4bf. 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/FRX872432267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa042424174e0a991f922f9865368461b6bd146208ede81e4a695935279cb2c5. 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/FRX762469560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6572704b40cb7523ee563f2a1f4c7a39b5a6a681b9db1c34651ac12b5131dded. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:03:43Z), 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/CH7812423054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc7b2004472a584ad8cbf097cae987bd1406ca92ec48730bfb0a99306a30ab9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA0R2492050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576c3f4d4abf0859b2e3c1d8484463f4cfbf2112e66fd5bf890937453efb9ce8. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZZ8A2409212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ae10505c054895090d1dec93a006f4d9358e9881986d53889f82c4b6ec0617. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:15:40Z), 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/FRX452520050.