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 0x41d022e8a6a01a984487e57824a9cc607dd974b2eb3ec9932e1658e5818ef222. 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/2fb4f658-eefe-4a26-ae27-e2ad505031f8.json and https://artists.proofprofile.net/proofs/artist/2fb4f658-eefe-4a26-ae27-e2ad505031f8.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 0xd4472bdfc7f1ceb4d409b315b7367cb9cfe02e9e26f495fcf3febc9fa74a1a5a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZDA81939903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebc05005caeea93eddaf6c4753fea3d1bc002b917e185fdb198ed9652a93272. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZDA81939905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e388f5847e6e8d69df1d0fc7bbdcd7b499e076cb65679956e5a0596a331fbb2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA81939907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35478db2a6fccccac76b7f8accf7c2c513378baab1323ff8da8a9bcc2ab417c4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA81939909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c645cb976e232257e2935339c3e6af0301baec602e1cda29ae1d50bc7af176. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZDA81939910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cafb56ba2ab7ef383c13c0bbe308ca0bf491a7a279cd869a5de07e7a728d8eb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA81939912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34508ac3d84a287bbf12d335ee9d0e9dd552072f82afe8529f2216135f1caf10. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA81939913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10668f56fb14de211f25f4ceec43d2d3c6af1bc8244110ccbb0449f975340141. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZDA81939914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a595483178125475c923ce1cf590bb820d94c0050111fdd728f02b04306ee72. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZDA81939916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2597bbb66f95a9bc913644457888068b09a6785eb747be3649cb88c11ab9b6c6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA81939917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cccc6226ee110a88cf9d30a06b11027cfd03e9e261e38b65de1dbd2dc367a25. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA81939918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cacac3bad796f69b34db7c776d2aba8cc03817a97279469601a029afd9f2739. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES51916922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8378512e9b2a374c09f74d580216a80d832a002a9f97efb4d30fb61504f6f8. 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/FR8O21900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f36d98f027720a51f59b90b201af99e01000fe8dac064f6f2b9d244023edc8. 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/FR8O21900190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf6e37cef1a0f3207b7bf178a461ec45754e0f7391fefd4d65373a6b0ec3bb4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR8O22000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d28c30b346052c9f1b72509b14e7c90f3be100bcc16fe7f7f28af113f7142e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR8O22000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb3d877bb11a33e87cd36692c414da937fd4ad746e4a586a2f14f6112a99af0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR8O22000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65bd8440aa6020e6af88d4383dc303c04c94dbde5fc408da87fd51bed292191. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR8O22000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3de24ca011f26b37019d601ae2751045c232b31b287d0994455bb230d58210. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/FR8O22000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5da5ff57e0ff530581c196556287a7296c8b688a23ef7c1db5222d8c2b07c4a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR8O22000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164382887f84c6aa87c0d5aa842da0971f70d1a4e363bd919b532e637a3752de. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR8O22000180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f3c405a1b1621c34beb7b3b73a509b7e8f6241c0c6a90888ac005da6bd4964. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FR8O22000240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f3c405a1b1621c34beb7b3b73a509b7e8f6241c0c6a90888ac005da6bd4964. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR8O22000240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b5f688b419cbc6de9361f79c965e454fde374d5ef595b4bdbfdc64e931d755. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR8O22000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015f2f8a058029e1ac2c4418eecd437877e9bd0b9ab18a34e8a945035925ce07. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR8O22100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7113b73669371100cdc1ff90b060579f051cff6f02bfcf3d7291e46801d0717f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR8O22100240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ab6a6f5476cdef09fada573cfe40662d901df0f74fc96aa78ebaea651625c7. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NLRD52263849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba2d76498473e7bd70bc109c6f85e414954bacb8a1dd182fb9d8836fa99ea4a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLRD52263853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa512c0122f236f2154b43754fda4e55c4db58b2775d27c8c20d8c2787aad6709. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWT2306105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73250b8669690fc06b4d3472594687928b2c04caf9d7c884cf97ee89737353f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZTAT2365077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc8d1e81afaa650da8056edc79d7df132462ff34f311173e3b33f2f07b4a30a. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/NLRD52263880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73250b8669690fc06b4d3472594687928b2c04caf9d7c884cf97ee89737353f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZTAT2365077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb37ae8e969f1d6936cbf6aea8f27d77e3abbf9d52f561da1761b22d6c66e429. 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/FR5GK2101080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d3979b29dd0dd1e58e8c5f084379e7c85d4e1ed43ce47aca10c6cc77ca3855. 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/NLRD52263901.