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 0xda9615dc5736ffb56eb5e5413ca57a35d498ce30c453b9cf13f935df8250fa28. 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/adb92d75-be56-4d2d-888f-69b3ade04cb7.json and https://artists.proofprofile.net/proofs/artist/adb92d75-be56-4d2d-888f-69b3ade04cb7.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 0xa17b61c2ff8aab45d329d4f8e231d9c1f52167c248905326a9cb00e3f04ece28. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:11Z), 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/GX8LE2252297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb816e6ca3260751f747a8d3feebae2e62b7993386dd6a97c2f931c0f8f66766. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GX89G2322898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2859659dde4eff603a73911e562a68025b67cc37e974cc478ef689369e06317d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GX89G2346210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc88bc884c70411378128d627007dd958e589e6221a4aaaa94765efbd25b65e8. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GX89G2334489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b88d3d6c3de25feb0be9ac142a3ad007b17df5192865039f5912741683b501. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GX89G2377241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b90416845ddbcd7dc38c81aa223e6d66074d28dc50e1c8f2f726b2c093c3b75. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:31:59Z), 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/GX89G2371305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1374771365030f1b422f92490b183b92b7089e63a507efcb818b3ee236fd9f0f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:02:31Z), 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/GX89G2304486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30f28f04a544a0d868038fc45d009278b1f34d5e588bd28377e112bbc5db2ce. 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/QZVEM2527264.