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 0xf7e2a41687aade3a0c85ee26719422bf7d77f04efb9c7b0879b12063ff17a780. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c7d848f-6dde-411d-aebc-afb8703576ac.json and https://artists.proofprofile.net/proofs/artist/8c7d848f-6dde-411d-aebc-afb8703576ac.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 0x05a801faa816b01e57f235a4024d9746872cf34d273ea8b756e24406f75abf08. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:06:01Z), 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/QZXLZ2383118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5be04fa2476173744d91d0ed3645ac47a0857db2069bd209426fff50507770. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZXLZ2383131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd391d46e2a58ab01e3d61dc6b26dee4aa04dbaec4dd9e958b366c0ce93689f44. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZXLZ2383116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28f48eeee4d0d520115db685941cfe1bcd6b02f2d973dd5fe2bb16b5e361180. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZXLZ2383129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77fe721d1a7f62758c3abe0b197200c16388b38eb0e3b4415d3ec5abedd590a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZXLZ2383090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bb13b273e25589b8640cd50af5cee3c72c3a706477bc93871ada42c71b2759. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:58:37Z), 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/QZXLZ2383117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af57127f3932387e8befc6dc05e1f44bf54c239ef62963915ee703fe155f50c. 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/QZXLZ2383088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399ec83c01f98b483da501fa17a0e68978598a99020fe1821818cb563b40415e. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:31:57Z), 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/QZXLZ2383086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84b1a6f1f651e65fe71c190dfab3f2d94197b18492a4b9f9eff0b4b74d9427b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZXLZ2383089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58484565e83bd5c19b4aecd3337b3f0f358619e5388a709b4318d3a1f58e6c78. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZXLZ2383084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc9f03c3c7bec3b4ef67f63aa2d13a38c2ccb98c2a6e502f268f9d5dc5ed985. 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/QZXLZ2383087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a599bbbf4a6f9e472eec337b905aa7d7fa02b78dd6d8c866271cedce62ca735. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZXLZ2383128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a42dfdcab7a68f663d052b572e9166da20a9f58d7118ebb19692d5f9bc8d3c3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZXLZ2383093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f432143f60f257cea0ffc6f25af0f86240f42cb1094227bfa12e93e40e710cf. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZXLZ2383119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc88b28a55b845f04689b4dc4f37542276a77c453d374de46bbfc657a4830d1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZXLZ2383126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985f713f297ceb143679f2fea717838970c1c8084d07dbade91eb4b4b04a4751. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:52:05Z), 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/QZXLZ2383092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f587c12e48bed023a1b6e9410f6dccf267887b395723b2eaef7918c659d17fb. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZXLZ2383085.