thumb|250px|Volkswagen factory in Wolfsburg, Germany A factory, manufacturing plant or production plant is an industrial facility, often a complex consisting of several buildings filled with machiner
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 0x9d84b2c1bd503c8e8ac515c4a39e939c3744fb799edda69cac05ca4705875eb4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2e1df41-ce28-448f-9398-85af7deaaa1a.json and https://artists.proofprofile.net/proofs/artist/f2e1df41-ce28-448f-9398-85af7deaaa1a.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 0xec78026856bbf07392192282db7ee55f280fa76ec76e19b23cb5ef41da9f176c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SEBGA1600464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedda674f72d40ffb6bd3ee1c9bcb429c43418b4bca2184f571d960e1ffe21fbc. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:33:07Z), 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/SEBGA1600467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bb71f44a8736221f85a48ca7f13a342c7cbd5d980adad02527723fae76eaff. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:31:59Z), 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/SEBGA1600468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89840419432be7223230a0694adafc3179fa6652e320340e0b8fca585fe951ff. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:52:15Z), 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/SEBGA7901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b67f456052b4684d7191e9f34ddf813ff63f6ebb01e50bc064529ad9c0aeb15. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/SEBGA7901040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbfd92165c5bfcd840c61594fa95dfb39900b8178d764bf1aaeecdf030880d8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEPQM0612944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fbefc771a5f2ce2e2a012a97c61c342c0c69a1b616eaadca903578654ece40. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEPQM0612941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62695d377e360dadf8f9a2f1794f1ae528ff917eea668aa138231ed32b8ab08. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEPQM0612947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c8e5e89aafd131aad02c6bdff74f14d2fcdc53512b12a3f50dd8191e9a5f4a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEPQM0612948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bbf02e3a8fecfcb6438f7bc3af78b58c999216e326b22467b04969acd202e1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEPQM0612950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbfd92165c5bfcd840c61594fa95dfb39900b8178d764bf1aaeecdf030880d8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEPQM0612944.