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 0x15a2ba04f09ed68017fae50e3c716010feb88db187c45231d9c60baed777e971. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4b377b1-5fbf-4ceb-899d-ffd179de7b33.json and https://artists.proofprofile.net/proofs/artist/c4b377b1-5fbf-4ceb-899d-ffd179de7b33.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 0x02f9adc0da54b692e1c51d8f81060789817903f7a765bb8b3c130afc59a9b85e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM8DG1977543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69936892ac6ac916e594f79fa2d1e30e34bb3e4096e21c195354dd25a9379689. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZHN52072232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e98ae855087f582fca45833120797c17436ddaf64323c5ddeb47fa183cac57. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6Q2195396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262efe5b377a0b3c377db6d636db3163e254c43d789ca43a702dc0b6d28cfc50. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:52:30Z), 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/QZDA42232853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a5a7e89b8dc43e2e899b4a94d9f005d596b54fc074070b6c55ed5a4b46dbd7. 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/QZHN52232979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23107cf2e9666e6a949f84a68a549a91aeb585ed716786a072d2b4119d82ff45. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMER2492019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9c9270ed65e40331052cd815a75324c96d85935752ba6877ac900b036b35b7. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:32:42Z), 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/QT3F32499735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359cb7e476f11729014daec531cdaaa1d8c08c03ab1968bc279068cc1e4fce42. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES92531144.