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 0x1f0f950bc3be8d13772cc35157b11b3d0f6e9af5b7d46a5f12b54b341ed790ac. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee80e737-299e-42d5-b753-37902ddc4d4d.json and https://artists.proofprofile.net/proofs/artist/ee80e737-299e-42d5-b753-37902ddc4d4d.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 0xb39e1e5c96315abc2b9970a3c6caab1c579eecd3a23a669102a7ca0a3939fef8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZGLS1909638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2716cc73f80440a3925d0a532940e71deffe32a89c8b10977b49ae817c1a387. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USCGH2099083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6fac31cb124a7a7523f9fc1e3ea8d805cc224fd560f8f93ada971da6eb6d82. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHZ32096509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba990789ab3dc0e948402d08129c3176984ceb5b8434db07df68d5140527730b. 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/QZMZ92492409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59063ada985afe1deb8cfd04000564e4f7da066a3b3bcbf52f5142971a2b2c3b. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:51:25Z), 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/QZGLM2570460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4f797db001ae521c905b542f6ae899042942af415d4f90b3b25cd9f0195cb0. 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/QZGLS2557060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ff01d6838c89c4e6c17dd4a4198cf510e0b0a5203b9b2c06175a32ecf82181. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:06:40Z), 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/QZGLS2561116.