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 0x5738c0b3a848ffe1efc681cbeaf9fad0f79fad47fcd96a538aaccfbfadf0ee23. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3781afb0-87cb-494b-875d-13875ea52344.json and https://artists.proofprofile.net/proofs/artist/3781afb0-87cb-494b-875d-13875ea52344.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 0x4aa4e9a1e2b482362363e61346fbdde39105a210e05680017570bad457d2cac2. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/CAQ8S1618983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa402923dc63ef20cc8ac71fbd923cf34a80304cd668e810d743fb2e2aaf88bde. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:55:40Z), 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/CAQ8S1625688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dca24e78713faf82eb7d2c572200bae4de88dfec0c224a8e60cbe82cab276a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAQ8S1618977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ea5b4070aecc69cf7b416369d522255c02c2a138b4ab4b542517a72b0e4b60. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:21:13Z), 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/CAQ8S1619427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe568c43c21ff60bc24f1dfc8b143b62d8c4abc982abb9a8f7eb2563602ed695e. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/CAQ8S1618978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25b19ad9d1357e9411c3d0119882fb30ee7ad294a59e358639678bd5136a8d4. 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/CAQ8S1618970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0e8943b2ef3471112368a16685c60655b7e0534692e2586ad719b525b000d9. 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/CAQ8S1621523.