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 0xd0ab16b20c1dbfc9b639e6cf3dffddbfb23c86b8e3fb2ee9e55283ea2927f100. 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/487331b6-cf34-4045-8499-b7f2d140b4c6.json and https://artists.proofprofile.net/proofs/artist/487331b6-cf34-4045-8499-b7f2d140b4c6.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 0x49548d72312b7d1c34843e0c00fc2204cc0fe8bf1511d7456e8466493fe83165. 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/QZMEN2140004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e73ea2b620e26806e52172178b1d61e468658ba6025303819da1e822a15560. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA52293358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278c1c9eb6eb37f63f6a43fafd14d23e0926768661ee06959f576c14b8b8f56d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:41:11Z), 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/QZK6K2263940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebc30542be873653ec27b4b5007e7f9755a9993b9b1f8122e318120104550a0. 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/QZTB32219885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3151141c0b7e3039150fefdeb4646bc0f4ed4acd6684ebf7b5703f502c22fb. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:14Z), 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/QZTB32219887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f53b13e48be6e4ef0cb4baf943f193c4cda2f02418eec695bc4b1ee7b15b8fe. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZRP42315250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efe040f72008f3b3cca22e5ac709cb208d86df0c9ff11e7d913d01afc4807a8. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZNWS2332547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f15c59df021310eba13cd2cbc2cfe4488ebf88e7a7e82a231ea9843674e407b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:21:21Z), 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/QZWFE2310703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed17707255487883adf90fe37dfd2daf6621f4e253900eef7c8cdbb9e1b1ffe2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ62430611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1878a811f8d6910c354fb6ba5ad4e237324e7f07b451a3b7261031590a0939f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES72478003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59aef715d2d57cfbb4c2909cae10768b9edefd5a12918a3f62d890e56a3d341b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZES72478004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b66a02148e0e3ff5a05730d2070b61882136f2abcaa8e339cef0a7a422cc87. 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/QZWFJ2417592.