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 0x6fa0243bb7cabe2af3afba7d06df799b202b46f502222aefa78e419164bd3f4d. 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/8514fc82-d61b-44cf-a3c8-d4dbb4126e36.json and https://artists.proofprofile.net/proofs/artist/8514fc82-d61b-44cf-a3c8-d4dbb4126e36.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 0xc8eb02d94bd14f6981e77f51fac93ee52d18f90d758db2535d6b612989ab4aab. 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/AEA142054625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c60013c6b7097fe2075a8d82c63f0cb1eb3a406462137ad598325308a9d7301. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:43Z), 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/AEA142113845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c9b274e3fbb4129dc8cdaad1fc46c408c2580f1f8b2bcc2e488fd97875d329. 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/AEA142106219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6872899db37e85f892b68b9d7abd6ade6ae03e9e274c51b13387c4955c566d0. 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/LBA0H2004136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd864669557a622480e964ffc2635d73733520d592498f77ca11775d1c96bb64f. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/AEA142212510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc6a26bedc51f12113d4f672a4485f6e97b457a110caa2a1730f286bf2146f2. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/AEA142213451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda173696eefa4b4f5c3526629026a661a8e5a449a64794df17c2ce78adb1190. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/AEA142300663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa654431d10d5083b5cd0fc4b8e7b257781c30ecd453301dce20d5e83bc05f4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/AEA142303165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ffa4dc60fbd507df7e0db340c2867f8e74f1eb6684fe486c9a1ee52d09c426. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/AEA142303671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6747b7b7134eeca3ae4ec31e5325ce21df2a8bf43a6b3c9a4f56b9ef44a490f1. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:46:47Z), 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/AEA142400677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dde2dcf6340d878294bb31cc61a378895998496ebf4be89d122b074165ffa10. 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/AEA142402166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fd153c1a3666092fe4e50ca3dc1d3df5c913f755e0ef87d85a1406df7f2ff3. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/AEA142500188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dc62fd54e199fb7a6af1dccb97a4c73674f78bc14d15aac286e1137b2f26ee. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/AEA142502274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d9d11e74027c2ff01ddecb2be374f8c56daabc2d95257c2ab35df877ef381c. 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/EGA252402129.