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 0x1aa640d96c0840634ab47d4a76e013c0bb0ee381aa59dd27870d16c20e7e768d. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1a49e9d-0d51-4cab-9a99-b4512f6aeaaa.json and https://artists.proofprofile.net/proofs/artist/f1a49e9d-0d51-4cab-9a99-b4512f6aeaaa.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 0xa5f0ae67f739286164bdf86fe2490069689d33e6f3e9e3e5684cdcb28a8f59f4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES52505485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70481d16a556624130ce3034037626522d9b56a85e4a4a18674fb4f7ea8a2510. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:57:50Z), 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/QZHN42563381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e12985e3aac6cdfeff64edfbdfb97fe8b927fed5b2b279f8fa41f6b60d0ea5. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN82500576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324e8f4e452c9e6043847b6c61821d6b688e43673228166e325d1cf43a56f4bf. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6M2599106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f5574b992a4894d9734a7c063976bbf5aa1b23cea2565f38dd98dd91cf3e8d. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZTAS2529310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13e2a1a2f97085c28d544e8ae38362c192481ecda69aea6f9b3adfd1cf4993a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:18:40Z), 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/QZTAS2529312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2fab58dd8d964386327447564eeec3b94aaf9bc735a3a45e15a3ad3e2146d8. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZPLS2529265.