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 0x432e7de4b6a9bb0b630365bc3a07b04fc3d774b30ca2391392f29e9cc6f2ba41. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e279597-faa2-44dd-a7c9-22b5f9f0cb17.json and https://artists.proofprofile.net/proofs/artist/6e279597-faa2-44dd-a7c9-22b5f9f0cb17.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 0xc21ab7b49274b4c098074ee7101edd63dda5051d63899512225c28e761aea6ef. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FRX871570328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdc65725d606df1e36fab41aa23249bca62c0b144e302fbb4cb9674c9a41a32. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR59R1723322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d16fb6e085da06f7c212d2ccbb18fc614e4e445e55ec854f250fd2e3e32716. 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/FR2X41839785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d2681610e5eba5b1c0d4ca22df3eb3b6437e250b31e1ae95f20f45b627b504. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR10S1999024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75e82d7c25164ad78d9b1b24c436b7dcd6c3e0c20ee4edad6917fab3141844c. 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/FRZ052000125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625a3ffe68418c11afc62308490d6cd532ef06fc90ecde9b62c6a4d9c3ddbfe4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:02:50Z), 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/FRZ052000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f669410195492e8f419a319cd19aad05852858e4e7780b413afc6d72a98960a. 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/FRZ052000139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cb71f01118a36acebdb6b923bd90ada0550ff96a87b63833bd50a77af6765d. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:55:56Z), 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/FR96X1880815.