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 0xf1fd107720802bef71c45d3140b31e2942162db048299a6d30ab3b3250b0a35d. 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/8cb056e0-bd4b-4deb-b3b2-8f4753800b6f.json and https://artists.proofprofile.net/proofs/artist/8cb056e0-bd4b-4deb-b3b2-8f4753800b6f.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 0x0526fea7fe3a4cc9a87434d096150c76cc790ac16bca2dbf96bc77ac9a5fdfb8. 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/QZNWT2418212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4d326c775dafa86473329611ccaa401fe2d68fa4caec2dcb03d520684923a0. 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/QZNWT2418213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90788f3c8914aadabc7f8c0ff08b8e2fa4ad728cf4b1c4a6a74020346abf9e2f. 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/QZNWT2418214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf45c420a0fe0a3c460e064617507f31055d04f4e1cbf580be1e18aeabe24c15. 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/QZDA72437995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba26a40a807439a67a151db684acff861bb2c045915629b09d760555bc03ea7. 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/QZFYY2452713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e582fecec34c8d6d848055d6e37219abe87d5802f199131dde77017549745b. 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/QZNWT2418215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1565d5b78a43c2f484e248197df48f25f1a6b47e22c4926629eb962ad7b4d85d. 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/QZNWT2418216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256605e396b24100dd37938086e9b7d4ef08111cc6400909ad69875860aec7eb. 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/QZNWQ2484306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf3c5ce1f8f931dbe830d694bd8a6d1dbb96ae08e10733c5f92df8d85f7968d. 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/QZNWT2418217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256605e396b24100dd37938086e9b7d4ef08111cc6400909ad69875860aec7eb. 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/QZNWQ2484306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba26a40a807439a67a151db684acff861bb2c045915629b09d760555bc03ea7. 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/QZFYY2452713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49350063de2d24490ee1948fed7d6e48699017cc3c3fcb6fb8be921ed0df3467. 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/QZWFE2378906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e187feeb18f9d1af93aa26e69eadec4deea2395a5b7d1c5457dd25396006ba7. 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/QZES72217497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdff64033cd1be2e6c225293e70cb715542908b40883fff06489dea183a8808. 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/QZDA52137693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf578fa55b2192cf6aca1765e55b2c706948ccc146569c140a9cd9e3164b19311. 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/QZK6P2076880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3befab253d9cd3b952fb54c56723eacd8d91f365c2b458aacd2c252729ffa3c0. 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/QZES52038301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4d3ee5fd1e9447681e9d4fab2636a900c7a5fa445b3e3df7e79d7d1722d109. 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/CALVP2071953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d63e0d53c9d5a56c4299812158fb457d407ea7dd471d8bce2ee4002f121b4b9. 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/QZK6N1937161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88501caa51581efe0766b07bc7e5b2c30aaa075db92effd3bd101cd3007ac137. 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/CAGOO1964858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c5e9880c6eb2ad453b4edcb4b230573b4100c1fc9b48cd9d91aadde1469dbf. 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/CAENV1997375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8846720a10fd516e58e912faf085c31a5f6eda80dcc74a95fb5937be36926cae. 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/CAENV1988879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497f4d57c72b42993088f58669916fad40dadd9de6109e12e4b8256fcd5b4555. 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/CACWV1812928.