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 0x5ee7125b9e46c5a696fbfe0ddc0030d63b1782591cca732a7f1738005cadca76. 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/9cdd04a4-01cf-4c99-a630-8b81dd3f7d3d.json and https://artists.proofprofile.net/proofs/artist/9cdd04a4-01cf-4c99-a630-8b81dd3f7d3d.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 0xa38d6f4aa81da05815b4fde5bd06dcb22c9a286156f309e5bb6152f39290c1e7. 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/QMAAK2403451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0251295d55387620107b276b2088086b94317b9e35a0522a86c743e29655271d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMAAK2403452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf18fa2069d52de390cf8d2790f59c48bc51bf2ca6a21724c7ac8c4fb6938c6f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMAAK2403453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe640855d9423a95fd01d500d33a060ee41c434f3f097d27eebc94c1261bd217c. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QMAAK2403454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9585f2a98f293effc97c4ada4a1ecb0ba808f72db28238a7c3f3a1f06a86a9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMAAK2403455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb32a1ab4a116e0800a9d7f9106df615550e471c673e682922bf3de808258e18. 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/QMAAK2403457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04a668c7af819c35bcd6f5c652e538b74d64e4dd35a1375446bfde678024e64. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:09:39Z), 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/QMAAK2403458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8861273dd4bfda99ac87d33ba8479c20e13d5ab83c2fcd0862f025f024c5a33a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QMAAK2403460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a107e155988e0ad443259cff372e32c256c13fe3217b768a5a78fedea65467. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:52:49Z), 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/QMAAK2403464.