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 0xd60511e30e1ba4712bbfd55737b663d2749c8623f3b4f2c4049545884b1cb6a4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5711ed06-70c2-465f-8bc2-4c656d613d4f.json and https://artists.proofprofile.net/proofs/artist/5711ed06-70c2-465f-8bc2-4c656d613d4f.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 0x78860f0fe6626211d01140bb2260365e1fdc14223e6d631991c1cf5f90c0228e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNMY2316970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789446350402ac78e497d915a2d8ffce06697a43be4ae9c0e397c2236f66d1b6. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZJG52434019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94327f17ab08cfc0cfaaa91c7ac13754b8818375be67e866ec1a3f5ff57a4ef0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:28:17Z), 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/QZJG52434782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86fc86ff013ac05af5248398aeb74d98c566878b46e37780393c5baa5558e3c. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZWFT2406896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503354c18d6b496972c9639d19d402f05d65c8fdc29733e1d361cb2d8943a169. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZZ772427314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7ec4d7a2078e279e847cd44de41ec2f96da9fce202fb420d31e072b7b81ff7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:26:53Z), 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/QZZ772427315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7787f672af1d94f1eb6048b03efb6b17c1848c30e43e4ec2374b507e1ee23060. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWS2490883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c40bb18fcd5975fef088390dc29adce642ae530ca09b8af6c0d8c70f568d35. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZFZ62404736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339a1366b6f86db8e4d2bc941ca60be0bb23e70d1c39e3e670c3cd969d458860. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ62404735.