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 0xd15861a3296a73735205f0d0939af96182cbf6a7985946a75a810c90880b205b. Chain 2 (Bitcoin): anchored in block 954069 (2026-06-17T08:30:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a806458-5199-4703-82dc-aa61d45c13b5.json and https://artists.proofprofile.net/proofs/artist/7a806458-5199-4703-82dc-aa61d45c13b5.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 0xb1505e621139a120910e916928821dc759f6bfae82d26a002af5ea42ffdd68c8. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZTAS2599673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c9f9229630772e0988d8ff61d06585eda663a387052d8c2e36470585d9f3f4. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:41:22Z), 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/QZTAS2599674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96055d276ae5ebfb2775f8994fd305c9a9205f8d7bbe9b48a889ece5a37120cf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAS2599676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92230fa7cf6deb3a5a208904b1a075c5170384337aefeff2b66bfc97f3dce618. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:55:20Z), 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/QZTAS2599685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaad31f64a3c26bfb17d3ea1fb24ea09c2f25d22525558c2721f533af846d27f. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTAS2599683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc759b4c90ad82703a488887db497010a3c80811b79b3ceed1d7e1666873d897. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:09:12Z), 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/QZTAU2579270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a431f48b791be83f66e000e8ed8c6f7f2fa326537384d3cc082d824f8134946. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB32543430.