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 0x780a2a6a457aa20c54610bfb533c73e9012e431a5bed807fc85f8d29e1f95bab. 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/f00a3c31-e51e-4fad-bbe1-4ce149d646e5.json and https://artists.proofprofile.net/proofs/artist/f00a3c31-e51e-4fad-bbe1-4ce149d646e5.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 0x9b1ae80d632c8d84ac14df8565319eb6a22b46e73cd37caf43df2c0ca9ceb4ee. 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/BXR1F1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b13a9c6dc9cf4c01aa911cf7b3da008654b9218c958982d38a9bc114f476105. 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/BXR1F1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2fe4af3ea633cb93315cb3a2592409152d1eb31a603b91ca34a47ea203b0c4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXR1F1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5e25adfeb6962daa34d0b844de97b9acec56ce232225bb2ee36e41d9d7cc4a. 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/BXR1F1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9c2e817cd7463ac00dae41e665e0ed3ad0cd987a3bf26a0263752bb8fb6ce3. 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/BXR1F1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36fdfd19b2c92405342008703d5b1a62a49be535577a90024745cebc5bcf18f. 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/BXR1F1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0e99ac4b8ca5e9e79bf59121183ed05ae17f87971f8c678c9347311e871221. 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/BXR1F1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb858fcf88f21e29dc88d82737c3b6cd617e462554fc06f8603999a8928b9b99b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BXR1F1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabadb347745c622998b291fe4500d5a6a996574113b24bcf65268be7bb502c13. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXR1F1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88689e1e98903c9a3c3de3555af5965048615b69e7becb978a0711cae3a79b0c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXR1F1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8944e059c20e37d6e3ded316c7b556143447508cd654478385e02506126a756f. 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/BXR1F1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5dc522247f1d7aa2e97d5ae42be47d241f684f01ae0de8db92b3e162380063. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:46:42Z), 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/BXR1F1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7650e0925539d093bd00fae4b2dd63ba7e30a06794ffb0814cb54a7528f3eedf. 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/BXR1F1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ca4f30629f5fa050280023189e6a4cfa8752ad3049cb2fc2dc23018e44a8b7. 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/BXR1F1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05390a583309e5419d1a19863e8d0d3f9826d3d9b8dd6d30530e7ede4def8db. 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/BXR1F1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7b394be468febc3a6d692c93599b761ac82a70e14249d188446c64eeff66af. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/BXR1F2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f034fe1c0b405121cc1591d095def978f0c13696072167cd323be5d66c3da9b. 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/BXR1F2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614cd61b27cf12a35fb2803d2099649fe2c1e724b2fccedf7cd1a01f3f80d6f7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:55:20Z), 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/BXR1F2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0519ee6dda097be81c722b3790aad16a28921b70e6851162c8f8b6c7e28c0b2. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/BXR1F2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9e31f2684b49a6b9f34fe928caa33ceddb02aee6b44dba58463a0f5f93ea4e. 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/BXFDF2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd908daf64f569a662b1c1bf91e1f76843ae5139e823200a87ebfb9a8225d9d6c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BXR1F2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fd160aafb59deec32bb06d5b4fe22cb5b3e1ca9b116f0eaf4377465431f14a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BXR1F2400008.