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 0x95acf70015137cf4551f96156bb312145c964ed7c2f783e8f7267a93b3650df3. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38d695d2-8ba1-457d-be50-4eddd5d0c46e.json and https://artists.proofprofile.net/proofs/artist/38d695d2-8ba1-457d-be50-4eddd5d0c46e.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 0xace85aca3c448aac1b27f3e05f9e75bb030307a81b47e5012eeb0da65ae77955. 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/ZAQVH2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdceb0497f03234825873605e024da415601825374bfe8223c978532e79083e4. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/ZAQVH2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87df6a1ed52b2e5ecdddc450da4af1c17f6f89cf34a41d126f89a4133c595e6f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ZAQVH2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225e9340d2ca933b52901bd493cdd3dbcddb77db7b642ce55b176312694f7409. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:34Z), 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/ZAQVH2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1221e30a000e6e5993146a292a3f6101894a061b8c76a6b57b571ebe864c8909. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZAQVH2100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f942cba244a96186bd888df6d4d15bbc27762ff5b48bcd4485c16c9fac0c04. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:53:56Z), 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/QZNW72223586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc65bb2601ecac1d229822446dd99d176222f63a8b8435eb26fb06723f44b3e. 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/QZNW72223587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda47569f58cd76cad4481550609819717351642fbf8602bc07eb923173e91634. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IEWGI2359304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a0f1f2bc71fdf6a7179af55dc57b518cf99d6f62f0bfc3d463c0be91ed05a3. 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/IEWGI2359309.