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 0x41e6d2b06679dbb59b81f75f3ab775616e5f9e987c8add3635bb6e29856b9df9. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c539412d-ae98-4af6-9f59-717b68e36d78.json and https://artists.proofprofile.net/proofs/artist/c539412d-ae98-4af6-9f59-717b68e36d78.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 0xae33283a48c837dd581e16fa69c57d21bbf06f9582b8790e20e144e69f3ec670. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:28:23Z), 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/QZS642200720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825f6988fee02655373e32b78dabbe2ceb9d82bfd2b2ea2979e30e5ef94d3d44. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:56:46Z), 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/QZS662258561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c8413516a3b5cecb0ef205b26dfa2bfa4913967a625f0a3f50f124f1b8b98f. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:12Z), 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/QZMHN2265982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e15bb3101b8216fd5fbc37d54bff9b89b6c3615b0df22225dfa84a104d80066. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:08Z), 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/QZS652216257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c28863dac3cce5a4ed8ae738ef5661d2b040c3985fbdad414555e458ddb826. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZS642264032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ac28390d97649b8a59e97e45fb507d94f70415006245947c0567ba62f0f941. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:32:20Z), 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/QZS662257622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475490018b822a4d4b0f2c64457c8d6fea37c43635e8d4baac9903571337c82f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZS632260773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd587633d4584360fc483a391dff70706011bffc7ca815eb6c0b12fb17043d11c. 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/QZMHL2296818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2637be7a206417d5e9498cb40b64e5342d7cf60c572da36c5b847e6f35672eb8. 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/QZMHK2231232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4794fcc86cbc88664202f3cd2538df43b2579c0dacdca393ca21271090299143. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QM42K2270429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac8313eeb7f38bb4d27869f0ebabcd5aa12ff13f8f49d1b311ff2c6d1b864c9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QM42K2290818.