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 0x6f2ab596bde02ec4b523ea3f867abf39e56566cfb088f73c741a382c4e5b8360. 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/dae2c7cf-6ae2-4266-afb4-d8f01d16cf8c.json and https://artists.proofprofile.net/proofs/artist/dae2c7cf-6ae2-4266-afb4-d8f01d16cf8c.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 0x1587d25cdb83efc2950298a8625cd71d1b8e064c4f24c784418dd55ae40c2cb1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:50:17Z), 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/QZ85M2073732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb14c84d1131bcb1ebce758a608a5b31cf2cc3ba6a53922cff3d4f4e74d6c0e2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNB82056012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db6713b26c885fd1117d2328dc7be05e0c02896f90e6182d6fed9169d22af10. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZL382253723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd066085144e57377c5ff379ad39a1e6031c730233f3ba1fe0d96316a5a8f7b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:52:39Z), 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/QZMWW2280674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0ce7960d070595f884e4ee904945e6df1bac9e73cbee8194d392508db118d9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:19:43Z), 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/QZNWZ2288233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a99004e7697edfadfb112e7eccd7264c554dccdaadc871cc3f16027c1bfee5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ22415856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd188c20fcf5a635fecda5855e390906a47c9b15674f1557785cc40251259b13. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZMER2474745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55c058bafbeefd9b15084ec343f971dbd61c1b57e29586cac18dadd077c8621. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZNWW2491194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f4b462bc750cf6e882d4bc7e9da1f55a0a5720193ea1a11d17645c648b11d1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZES82542132.