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 0x4a28fe0e3adee6f7f2d013ea384ac4f80d256116d2fe8be723462def2b864f1a. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e26ce16-b553-415c-b837-9b2660684b18.json and https://artists.proofprofile.net/proofs/artist/9e26ce16-b553-415c-b837-9b2660684b18.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 0xa83a45dc3b50f955b12d11fb5cc4d7971403fcbaebafa6c2cc167d43a514d729. 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/FR3X62507001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939a64201bdc26deddb5cc178ea4440c9e7a933ed488042699888eb719e348e9. 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/FR3X62507003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c98f0bd9f1da4cd70f9e7e275fd96c2c386b463d4af0af54aaeb9d78df47bfb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR3X62507004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a2331afc2efe060e7d67a0281b98656dc04ef3e08190ad4030c9646e06cb0a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FR3X62507005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8924a7501ca9957661cdb18349f2c9666c50980f2b12cdd172436cc27e2b46. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FR3X62507006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b4fa1f21dd8b8d10107e6b4e96d2c2ac6343e5a51005d557b56606f67e0635. 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/FR3X62507007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d322a31facdf60f9088f2a83a31f5f4faf80361a095d5ad0b1635931dc2343a. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:17Z), 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/FR3X62507008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f231824d7a8bdeca7c23a04de4a1ef515761e7953943b3ae1b19cc3b4114a1. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:45:39Z), 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/FR3X62507010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be7c465d3eb82857fd4f6bf37cc28ef0f75e0a7cffb486698a24d52c9a9b302. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR3X62507012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4b323e0c48a09ca6895c46b3d7db104d9c2beb62c2307ff90faece5d1a8f59. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR3X62507013.