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 0x1094a9539318d78e9c8a01f2b48cb8978d13c3667943a5e20ab6e4a634e873e9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c75df6d-d528-41c8-8125-25e5e8e58db4.json and https://artists.proofprofile.net/proofs/artist/2c75df6d-d528-41c8-8125-25e5e8e58db4.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 0x53c497c0348c91733b41d270f7f20db071b92b2b4bbb97bb090c282ba4e62892. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZS642261145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181ab39f28419cf02fabd92d900e9d5e78a8a50822e322ae016c57505ab006f6. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZMHK2289563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66aa7d4c1db6084f491ecf500ea646999e71f0944b9e1426a948c9b2842b4491. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZMHL2214871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea483272b74700f0c117f43a76609d2c63d645e30de4c9c4d252e19fa02d3ac. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZS662483743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e54f8bd6535c3c36e665c3db1083a7bd9a9e0fc11e2e4dff9879105f5aa761. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMHP2483830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacf8564bed2cdf85808e3991f3ad764fe2eff0a220f75ee52ebdd578120bce3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZS672405317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6268af8ee50c6e3aa6d7acbee13c32e54950db7157e52e9dc75715b5220a6935. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZS672463926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c752030c438688bb4e3f32895ca836cbe308d523d984bb0d2c3535f81b70ba0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZS662463361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc052e42228874cbca59d79d990e7f36bdaf04c947ec244a578caaf87edf3abe. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZS642416312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e58da11d0cbadb39c8099156bf3fceda850a3bda195ee1c4de35da468592ea. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMHK2401595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f691869a52cbb4d8dce96d6ecf6ebe4162ba2bb2233e89867b7aff1157e1b54. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:51:00Z), 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/QZMHL2422170.