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 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 0x1774bb33d85a37c4c748845a31ac7e99d4c0dfc15c5d2deefda2b4ec374132a2. 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/5bcf356b-9757-45b5-8890-471fb5f7d07d.json and https://artists.proofprofile.net/proofs/artist/5bcf356b-9757-45b5-8890-471fb5f7d07d.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 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 0x3e313bd46ce91790aa95ee824a48aa44424926d02ba876b3e0b794a6837c3b94. 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/ARHR91600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c0a1080815834d09e8fbb65d43a780e2ac24ecd7dbc1d77a0a8c46fbe4241e. 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/ARHR91600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306842897cdf5ca02d990ce3e477c61adfbcc0848485252a285f48684fa1d735. 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/ARHR91600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf94b28b21c952ca33046280aa24a3760f5986c4c7f075c5a52faef277d3c58. 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/ARHR91600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed2157c727dc7d458f7d353d73ac67b02f481fd826443246d89f713f730730e. 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/ARHR91600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752ba4988b1cc0a8dc3bfc95eb5411f86c7c94d8a57784462bf0d7b81cc65d43. 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/ARHR91600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416a09063f104600c644992a2923f92a261372d9a465c1650578d8c3263e70bc. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ARHR91600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc1a81722fbbf06c7785f39826288b634108adbdc93098b76ea584ffc8e3b57. 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/ARHR91600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc165fd06b20cd51404cc81393f04823f7808a58f659083509db911b176e9d5. 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/ARHR91600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818f5b3eca4adf4cbab2c65b81aa7822a14ec0c55dabbecdf74702bab23b59ec. 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/ARHR91600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc945b2b401bbe17604ae6d2e9ccc700e5d916056f8b6acb19259df8e7a3daf18. 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/ARHR91600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5492ce503d88c294c12743409f30b7824eb86b5e2248d3a38f0338e2e14858. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ARHR91600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f99bb76475f1ddbbdd605c33b254cb6b3807bef27460e1aab768f0b9f8ae582. 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/ARHR91600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcb7c6f3830811155085b2c840ac1eec8b2256347f8e914cc6e45b8e5e3758d. 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/ARHR91600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74470f7eae48af735f84c79db39aa182cd2d90cb9d38e16c274229226ba30040. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/ARHR91600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4d9533378899ec457b55761af9a4dca6943b8e25cc4108711aa34c4a482a7e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ARHR91600030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb244616615e8b543c258304542f934c1de52edccdb58add7c51f7dcfd44ac773. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ARHR91600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d94bc84097e60a583e1214810f8ae763dc3535d018126230ceaa925ff34b1f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ARHR91600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b551f59d6fc6c006d567468ef72a9ada21974a5b7a932d0caf45d3d2e127f5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ARHR91600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf405768c6e83b99e2d5660b976cb3826299867d6ddef600ef0a6b248967f5fe3. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/ARHR91600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64340abbc8895ae50c946ef55de107f5fb216f413877d74fe16562691bfe6527. 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/ARHR91600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff87aceec15cf60b1c22cdb3d9b9839159d69287dc50c37a26025364215dcbe0. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ARHR91600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696e3d302971f6250b975fbdbefa3c5a7b2980a3120f5d15a13402ed20d0c23c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ARHR91600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803112bc75eb533592795f7fc54011a00580010e081342bd8f0e985eb4aa6474. 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/ARHR91600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be83e96fb9f660eab69dd8fac68ac15dc7d1dfad349b73e9f7788a5fe7b0ccf. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ARHR91600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc945b2b401bbe17604ae6d2e9ccc700e5d916056f8b6acb19259df8e7a3daf18. 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/ARHR91600025.