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 0x189da82445d0f54fe2f7caba2952dd73129226c4b2218fb2eed16e2e3916a097. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/835cd0e1-1031-4273-a2a6-7f17947647e6.json and https://artists.proofprofile.net/proofs/artist/835cd0e1-1031-4273-a2a6-7f17947647e6.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 0xd978c146e9b983142028354ce8496b8c1c02230fd53751413d51378186d5b1bb. 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/QT65Z2501404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9c4a1935a97299e8ad61d18d1694de1e099db4c9d4e2a2bec8230fd664c999. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:22:12Z), 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/QT65Z2501414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc9156a559f2a5fbe068e44e30e9d0c4c6487c196e8209f3a77e8f4e771f913. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:00:14Z), 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/QT65Z2501422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca228f40dcc8613d6b5a10cb10de2484a3983a74c1223ef91f33de945ddb5bd. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:28:14Z), 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/QT65Z2501431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d564bd8412e8cb00fc594bd10e105d9b2d98dc272001414594ddbfe80be588b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:32:13Z), 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/QT65Z2501440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81196d70c3e61fedab6b53616337e301dd7f3fd983e3918fb3dcf6f08d686424. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:56:33Z), 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/QT65Z2501442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f8bf0eb48c3844c16e1fba627d13e5ac35c273d253ea2d432d324155fccbca. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:36:48Z), 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/QT65Z2501445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f261f3bc94aa7c5e76865febf1058e8783407953aa7cd55ad9e8adc0b16900. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:03:50Z), 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/QT65Z2501451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3b21cfd53a0d8c3457a65585800adafe77d17e0eb09a665a8149e4c54d35a5. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QT65Z2501453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a180afd01e0b3d431428de85a8b9e1b3af66f01379b37a99561649cd207e41. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT65Z2501456.