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 0xbf334a99c2ec2a7cb5f3261d6f2dbe6111309480adca3db4f67abd124024812f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a92e119a-586d-4b27-a389-91805def0e43.json and https://artists.proofprofile.net/proofs/artist/a92e119a-586d-4b27-a389-91805def0e43.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 0xe82bc1a3fa57adabf4d3b1802ee142c2e8fe49853bb917058c247fd5a83f8430. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBHLW1801549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e19f1954dd483d9eea52de43122d446c906f1aa15dafe862ce5ec8e1bbe142. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBHLW1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08769f8517fe700f2f9e8200299b7ba556d8b21b157d83e3466475d49261702. 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/GBHLW1902688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785ac3ea631f5f5621498978aefd18e439816dfc1da109dbd0c33940fa991f10. 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/GBHLW1902690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d4a3773836ae2d81fae551eca34e73f145b487677b066d77922e0da81997cd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBHLW1902689.
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 0x03c10ab76ac5a66625b35dc170187b685d4e7a3175d947fd6cdbca13e8f7a657. 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/GBHLW1902691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba10da06980b1a5ce09b0a623449c927585305211f8fd845f3e0ea360e63c37a. 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/GBHLW1902692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228d256bb03e828ab8248027c49ae2e05efa20b5be87f3031f7c04709e4c471d. 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/UKZ4L2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43db0642fafbd3644bfcc3d9205b3746083144dc12b6269dfe64bc6968b1fab. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYZ2214064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed298e89b2d6bced121db95e4da3c10fc54f8a4b730823e9b40917519b6c129d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:43:41Z), 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/QZFYZ2279168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4969099b572b58c3593ca079d3d6d0d6c9ed8f77c02848b2c8ca33d4b9a7329d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA52257605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa495ed402796ab777836aac6449643ea69dc55fc9b8db7d3108ba869124f65. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA52257606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc468c75f1489f4bc67ae269958ab55fbc98521158269375ba3e477aa276dca35. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA52257607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27df542616c564e041d4fc0eae55f64f09dd2b27ffa4ad8b0f76e527592e7cf. 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/QZDA52257608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820bd7d28f43145ff61a1325886bbab8d2d4066e7fa4f5af9454314f4b1b3200. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA52257609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed08cba5ca4982e867266ab1e3e7836d62329007953802fb989567d8546c1e6. 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/QZDA52257610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a733b59ca19a604637d8297fa12a86339995da63d1d283e826558169546d93. 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/QZDA52257611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7050af1a24e3c60c0beed1a01858ad799afa49be2a01e9cd606f0f5df13915e7. 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/QZDA52257615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd437381c83cd89c3593e1fe85f444640367661b733be3dc2883d11a089938d64. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZDA52257604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a855f7d30c85148b5ca5f884f83b57d0f8573f664af94cb15b08944cae5a1e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZDA52257612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14258be0ddc99702ecd0d025d5d20aa740cb63403a634c1c631aeb59391057f. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZDA52257613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613990bd33ffbf275cce97638573201acc446e94eabf846ae48bfcd68d2b45fd. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZDA52257614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0911ac8e5f15c8490d137c8b346442983308f73079f6511b61b1dede501c28e5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZDA52257616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0897a6752bf8770cccd72cb153c3246a929780d0b15f24ca1a1c9d46f28639be. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTBA2241746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42cb2d7f0caa6eec73363a04ac1d24edd3729a092ad3741d6b6bd3f80c5b9a0. 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/QMFMF2422357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f91ff99d35a72a3d3b7e4a2025eae271112cd545f23bdee4b9a796e6ff9234d. 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/QMFMF2422358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2379a5b278f44429b60ba6aa4dceaf4cbd14f6a1e7459ee33b4529ba09c08a3. 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/USA2B2512025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310be23c90affa17a56bd63efa29b6f4c7c1657fade297cef2822bff08326926. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:56:48Z), 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/USA2B2512026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310be23c90affa17a56bd63efa29b6f4c7c1657fade297cef2822bff08326926. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T12:59:49Z), 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/USA2B2512026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4922a48c4d2163805f3aa45b35adf244d1c56ec41aec5e7d1f252222c4d307. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USSUB2246623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839eb9ad26f0934cfa4afac61d9566e230807865362a9fb3b8ebff6d78515fea. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBHLW2103439.