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 0x5c8122ed6f095d7be0745d4545430f93dae80bf741bb4fd35b9cfd24f490c0be. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3246208-76c1-438a-b8fa-a804d8863ba5.json and https://artists.proofprofile.net/proofs/artist/c3246208-76c1-438a-b8fa-a804d8863ba5.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 0xadc427a150efdefc7d71ebfb59effea41735f9a3230e173a955f12257f31dc7f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812369910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade2057f30bdd75969a7e9650ceb38d7577388983a7b66813e29f84f8c918b8b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CH7812361994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4a30595a50cb4a5c0730c2fe5f4036ab69447fe0400e2bcfdcfeb365000740. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:39:51Z), 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/CH7812365427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a52ec5f02faf8d9eb71bc8d9c4c6bc3255a7a3c2fd3356728476413d813ab4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:07:23Z), 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/CH7812368263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67ec94ae3f06c3f88011948f908d634ef83e76e32b24aeafd1b22fc5df74eb2. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/CH7812367994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a52ec5f02faf8d9eb71bc8d9c4c6bc3255a7a3c2fd3356728476413d813ab4. 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/CH7812368263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade2057f30bdd75969a7e9650ceb38d7577388983a7b66813e29f84f8c918b8b. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/CH7812361994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67ec94ae3f06c3f88011948f908d634ef83e76e32b24aeafd1b22fc5df74eb2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CH7812367994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4a30595a50cb4a5c0730c2fe5f4036ab69447fe0400e2bcfdcfeb365000740. 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/CH7812365427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67ec94ae3f06c3f88011948f908d634ef83e76e32b24aeafd1b22fc5df74eb2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812367994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade2057f30bdd75969a7e9650ceb38d7577388983a7b66813e29f84f8c918b8b. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CH7812361994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4a30595a50cb4a5c0730c2fe5f4036ab69447fe0400e2bcfdcfeb365000740. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CH7812365427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4a30595a50cb4a5c0730c2fe5f4036ab69447fe0400e2bcfdcfeb365000740. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CH7812365427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade2057f30bdd75969a7e9650ceb38d7577388983a7b66813e29f84f8c918b8b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CH7812361994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade2057f30bdd75969a7e9650ceb38d7577388983a7b66813e29f84f8c918b8b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CH7812361994.