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 0xba26b77760f334a924eef0d38619573f0426d436899f2109a396bbaff2cb6b70. 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/51c5ad68-debb-431c-b7d9-c131d76e7186.json and https://artists.proofprofile.net/proofs/artist/51c5ad68-debb-431c-b7d9-c131d76e7186.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 0xfca20cb92f90ef4a496f18cd0bd706b8f96522534b5226834233df96b7057475. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/TCAHT2455058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cb3bb9d3e1643112f9d029f2477de8e21c687c9c1fab152c3c7ce2533c4b32. 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/TCAHT2455081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1c4f63ce4c31c59870627d9d11cafd1f3b4e4ee5b45e2be28116733ab3834d. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/TCAHT2455109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd914edc1a1cd20309beb3f1a0a23c82385a1a011480199d052d9f1a2e964fac. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCAHT2473914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a819bb58b8302081399a3324a983e22a23835012beb95a4342f956b9e09899. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/TCAHT2474219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92aa5dd3153c7943b5790ce7ba1c3c194adcf56d4f5d46d97bdaa8dfb8ac4be8. 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/TCAHT2465501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38583b692e85ebbd18f2cb6d814182980258239e8593e3374d04473ac31ea46. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAIU2415049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7118e4213b46f0247d6c086e1e5dd77dae0a1c8a91961271c28632709897f8. 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/TCAHT2474929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd780bb4469cae971b23510bce10e3579bd98ce95014b808f1cdf77b835a6d283. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAHT2474945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17a455149252532e59a3cde0b5682d83e0da3cadde506f49c7f228149f31154. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCACY1797014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e9e5565a079c5151e461232c36895f0963521167aa3cbb21d77f26052722ec. 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/TCADZ1842813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba25d14063d16e3453494e23d235060adc0df78b42097fecadd60df33358284. 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/TCADZ1842815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b91f1be5c6a1d5e2024620d618b22df4365142000b6fa3a6fa8869dde15046. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TCADZ1842816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c49e835baec7043bfe19daaec420a93a9d11aa01c7af3fa295a954f18e11990. 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/TCADZ1842827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e46e0143a1f63e7b04f8d9e2816e83b228779fa6fb5f25cb08d1a251692a140. 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/TCADZ1842828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ce5548275a3c070d3e985965d0b4683e25f75caf3e8d7d87220d5d91a0b6c8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCADZ1842832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44a8e1f01fb69bfc70f26a73d47c336877888ce298642a320e2848ca56a0bc7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCADZ1842833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b92641ff40b5bf2df28b4c0963be6e01e65d2431f5407b486225c193c76428. 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/TCADZ1842834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb79783ca3c422ca0e11836ff99832f08ce47cd24a6b7d90acdcfe0dfd1b309. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCADZ1842835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f40a33b9efce2d999d7472e214b4ca1b34a3e338aa6f2003cf2378d005896a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCADZ1842836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2966cffa479f97d70b4f2e0ab60ac6cf9167b2ecb6139aab4ec4287c4e9c9a79. 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/TCAEF1998322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452c2c7daf579b836a72f478fc9a0c15a6ecd69dd493b7d4ed06d30800672066. 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/TCAJB2479664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bae77ef2d4e40a4c55e1f67e64c5bf51ce9a57c27f393181c8ca052ffffc3aa. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCACR1674252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c550dfa8ae78a2ed513a0c8abe4c5c093d08a92a13c5d4b4c09f48052e787. 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/TCACR1674779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c07ba1503adbebab6dae9031d7074922881b5588112c43ff5d17c37e016182. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/TCACR1665581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586c4b7b8d6119eae76af95e155130d78aab438e7fb0963863d52f5ab3b958e4. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCACR1665575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853bfecebebfcf1e806a91c9a52b29cd67ac58c6233be2afdcf39b896e85d605. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TCACR1665577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd284ae23326b3e19ff75be6e66e5abed83fe1c584ee7552a2d122d803175037e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCACR1665585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0eb3753f065110dc2e27e6f9532ce0889b8e1052ed076f0acebfb4e7e002b9. 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/IT0CF1400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf84d26da96c1af82f7db2c65bf03b26b98ebcfc2967c50a1bfb956c5b395782. 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/IT0CF1500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ff132d9787c298b61ced223324a4473ba41b4ca3cf078838f1205fc7a43594. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAEX2022140.