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 0x5de0877fead9bb5e6f125215a34546f10546ece7ab8ffea1aa587380e137065f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b394d8b2-c0bf-4484-aaf4-f580d0177f04.json and https://artists.proofprofile.net/proofs/artist/b394d8b2-c0bf-4484-aaf4-f580d0177f04.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 0xa75ee3cd99e2776043458dfbc3d0d61202a0654f57deaf69d4fc4e9247c800b1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6QE2057912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32719bc25ffdcf706bad8aec54fc3743c25465d82daa346e97b123b17d4b46e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SE6QE2057908.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dddea22063a5cb55cb1792e1efd07e44f386d67f4cf9fbf61d207451167368. 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/TCACD1507053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e5e66feb5a87d67e6b17cffa2a64b7c5a6f432c1e453504905c6075c9eb03c. 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/UKGDC1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba84d0b82a1cc129593dec0e14179c730a6fc16ff13325cdd1c17fec4666478. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACD1507043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8100ec1fa5e16c33954ca96a1302867dcc5a6438ccc4765937fad324f0fc59b4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKGDC1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1275d7be77240eb4c979baf0e290bb577f6d7370e2303e6e8773672e2250d2b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UKGDC1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9823c283c77a43532c9cbb06b160b5b099e346bbbc1a1e454d7294754f2d582. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UKGDC1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a2e25e00d5f7149bcbef983aefac02306d762515a0803e33b4504e07686ce8. 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/UKGDC1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b779347af217009236ba735941d64b4bdb2750019bba940a232c0c26fe0f06e. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/UKGDC1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5254db4e8bef9ce89dc390374ce6a305bfdbab21b5a72b0a97cb8059b471e4e7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKGDC1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48532336ca8436d3029338d3d7ba5804c9083dd4058235b0f4aef0c95bcbc85. 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/UKGDC1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbf3917e9142443449ba0ef93c4d51a66676bc03975876724e69cc2985543dd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKGDC1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb757926ae6373119e0696a0d8679b9300cbdec81496ad11561393f3c3b662f. 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/UKGDC1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec7f947e50c95cb824bef4955388da4cde1a59f5efd20054ea590cad46b9422. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKGDC1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e11ebf2af373dac9e2262f094ccb788f1e98104bd495cd8f5b59a7429b4b26. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:32:41Z), 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/UKGDC1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8b015e627f843c71a96f7a57872e08a5be8556dce4f2abf055272794e3c3b1. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:54:43Z), 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/UKGDC1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad534a2da74de0418572f24d0bd524dbd233730d26cab0122e5709ccc8a56b05. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/UKGDC1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf7b551301b2805f7e15ad2b6a3b41c6176a07c5803abd8b1141421b1588377. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SE6HN2018310.