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 0x220f179e36db5d0343208fe6c7f604d8ec5723882d0e0affe6067fb3ad79073d. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a6dd179-49f8-4159-9df9-535f168b4a92.json and https://artists.proofprofile.net/proofs/artist/3a6dd179-49f8-4159-9df9-535f168b4a92.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 0xb753149e9ee3f24eb2d6f2d9e6ffbb0e4098b81d71c0ca5a955b6a0a6a42d60e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:23:04Z), 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/QM2L32200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcba37d898e9db7332617345ab30437585d15d70484796958cb2a2d3fadff5b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA1958801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ef2438e0d20b3add9a64f2374b1b9532f511ea7487df6103f7da30ee1820ef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA1958807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de9c710a88c0c89758d960a284f72e91726f38790481ebd6eb2fba884ba3c67. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM2L31800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4396ec6a05c5fda61a89946c10d380ef61442a353c6fedb9cd0b15cf38b87a2b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM2L31500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c78d311b22816d0814d583ed30cbc76abca6a42111816df7d3bfe2c32083c96. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCABJ1284060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e13b38ae7eeacd9d1784e16fc766f07d3ac9f5068864a860a56dcc97243c98. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCABJ1284062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24609ea133d3f7a7b9738102b870af997dc5c146b35490223b3e83690d379cae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCABJ1284064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de9c710a88c0c89758d960a284f72e91726f38790481ebd6eb2fba884ba3c67. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:01:45Z), 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/QM2L31800002.