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 0x0c6722e03b4530941e51727a481fdecbd33eca6647f8c4e311a5498c6cd9b49e. 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/16336048-db2b-4995-91d3-ee5db9485762.json and https://artists.proofprofile.net/proofs/artist/16336048-db2b-4995-91d3-ee5db9485762.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 0x2f343043ed2b9ec20b0f8ee8d00d1abf9eea458b7a2c2eed1565a6515aabad19. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6L2188296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9800cfda0e2f7c8f6460cfb171d46eb1ada9665211a1dfc6910d47b0749db8. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZK6L2153457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cf7330a4edd1e1639168091debcc2e4c5cea9193d35e1142232f99d6167285. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6L2151116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cf63d5ab91d09ed99e585c54725a32fc4d0be072d3fcab2ba1aca8438f2bc0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZK6L2153459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d3e2660f9106c04e0b583be34e8b6eb20221615d104fafd6ac45c04c67e110. 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/QZK6K2179705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf901fe7749280e3994fd7c09bb8c6401bf7e7c9aedabc3d731e558d4799c776d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:42:30Z), 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/QZK6L2104746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9d8266ff1399261af1febf32d6ccfbbea19054b8231fa7df63d8ed9c8f3b20. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:09Z), 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/QZK6K2179706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bbbf6561c71169eb875bfa71fc33aeb4bb39b32115d3735311d2963b06eed8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:57:07Z), 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/QZK6K2179707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56679e86dfe8da9a4dad7de0554a360fc157d2cfd04896e3464d8619ebf318b2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6K2179708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d2ab28e7ee044e84b1d0341f231e08133a5a2860bee6a733e74d47f1bfa9e5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYY2278649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44755bdb893c3b6752f667fc41b7573ef956a7f242a7abedc09deb90574c8c7. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZMZ92282665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dd422b6ba053685a4c2f8b4fa05fdae385cabfaad5d74c18cd3364a812384f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMZ92282664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90263baa7a1c38579697232e88b6b54775c707a4079bc6ed245b0113cafb8c25. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMZ92282666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac5bb970d2fcb7ea692268570c8c2f2654101a9f6ce9c72ead7478b844e6df9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMZ92282667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7774d1f46857312e78500e095698454040a7f9add86f6c0aa8c3d9276db3083. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:52:02Z), 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/QZW9L2223526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd609df5f623816c00196ea1ff62b05713adf666c0114dc55ba34d576638a7f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNJY2394066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb899bc23034b5aa0fd14326886f7b202861d7398acd6745193ae68d660bde63. 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/US7VG2462198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9739ea429fc3e71c8428bd0df232a1fdcbf79005869e292f1ad2bb22b008cf. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:18:25Z), 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/QM6MZ2452582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7411f26af9221b48e7f808260fc1804f13e0c41e7b82f6c7392ecd6ab91ecc2a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QM6MZ2452585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5db5191a81d15501bb0af493c0ce73e06a297f2a6d848c05b96a13b2dca8322. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QM6MZ2452660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e0608426307c9020e955d080d2c6184cc7e959808a9b85e81cadd4b5678a19. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/QZTVM2577850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfd152554d2134d1e85f070c91839d2203ae97c1711331dacf84d7d0bbacd24. 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/USUYG1577852.