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 0x4bce04db478a8af33386bad766bd4c3c967643624943648cde0f9dba74c35ad2. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fda4e89f-41e1-4fe2-af67-9ac1d78d7c19.json and https://artists.proofprofile.net/proofs/artist/fda4e89f-41e1-4fe2-af67-9ac1d78d7c19.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 0xcdce9dbd967e89060d405bfc3b521b82b10fadba157c84d098bd4c727be72969. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GXF9Q2405195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b8c87fb324c8b1aec4e94ce410b72b2ec2e02f1a9cc460b190b09d5f624bd8. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:13:19Z), 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/GXF9Q2412162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0311e0bbf80f1fd0fbda6bc728f45708ea357d3ed7173c2b73c7f3bb54e6f146. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:50:42Z), 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/GXF9Q2412209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67a67fef933b56daf1abb6c958236cb8d1c0d3f6c2b89d74c5411009344cb85. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:35:59Z), 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/GXF9Q2422392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa97b1500d10fd7aa38cd525d8b42af81eeadf3b7c11d3854d6e6755250e212d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:39:40Z), 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/GXF9Q2575004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b55c8e0b8bd6888c2f2744f3cc051059b535997302d9faa65e0b9a26d47ed5c. 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/GXF9Q2575844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c343121361aec93b40c216c9f55012371b6e0e87a8c588ad96d02573cf432f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GXF9Q2575753.