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 0xfcd10e5b169da84957456529b31daaf086992ab446f5a391243401011263615a. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab993e4a-8a10-4f8c-951f-1eaeb2d68ae0.json and https://artists.proofprofile.net/proofs/artist/ab993e4a-8a10-4f8c-951f-1eaeb2d68ae0.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 0x6de9c6a73c6a76ca08b3c879925e8715d02f5d9c0170177c75c4a6c0f3698fad. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR9W12446490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de9c6a73c6a76ca08b3c879925e8715d02f5d9c0170177c75c4a6c0f3698fad. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR9W12446490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29c1d4c3fb4a621ac979ac1f08bfbb1e6d0fbde99209a4ed528c5630d1c294b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR9W12447147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9281d7783432e4a4bbc9550ce3863c7d3a93ea987e9e13b56ec93714cad27974. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR9W12447145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c564bacc773c5f30bb18a441de3e1194d48b280c22873caeccb24260bc92b95. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR9W12447150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff178b248b8877ada8f9329cdebe0b322241e19991566195e3d945bcc594cb9. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/FR9W12447144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec7564e15a577c87efa545fc7fd0207426ef42169df17a71d32c207a401563e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FR9W12505100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075609e41be3b1d908b559d46ec6e60640868ae18d516a501dcd72078161b7fd. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FR9W12505101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac0bb046be32a67d975b26afdd3a99ca317ff466821b6d180585fba05dd75c6. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/FR9W12515776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8830c0d1f67b93a88ece73d10e2d361e5bce020550e12f72aaf315ae6dd04ada. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:08:46Z), 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/FR9W12545127.