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 0x26ba4508064ab3973ad5ef9280b347382cf8baf777db8135eef4fb0ddc55a533. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b89822d5-8f86-4ae6-a4e6-c32ca77f0437.json and https://artists.proofprofile.net/proofs/artist/b89822d5-8f86-4ae6-a4e6-c32ca77f0437.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 0x00d3d24bec06d1e7b37ed406d21df37683d4abcfde3dbdf8886e04ab04a78b3d. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZDPF1822097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c630d581252111b38c535d9157e4910c010a94dc50f40f638baf050014337c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX282019739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555ef2df65eb06b01a4a0b95800f54451d6fe2d165748a788371c27e922c6491. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:45Z), 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/CA5KR2167993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391da620b036856da6a6d58e204f02dfb9ee5a0701add7e16fc9683424ff21cc. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CA5KR2260040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb4b4f5c27d0ca45820d0030549a61d2d743bd1242da8ec2ed47c1852ec36fa. 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/QZK6M2323034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe7d49601a18bd9263af32005869d5673ac409a025c8aa4ea3d543e3a3741c7. 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/QZK6M2323035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b705e5528ca79d5274dd698548dabe5847b6d0e100cff0de5a6c6914a5564a. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZK6M2323037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a37684bbf6031b73b1b2f66d5ca3eafe29dfe43be8e5a83a798fafa0bb81d86. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZK6M2323038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a64586bb9086390645e1055807fa01e1e3588e8038801ccb090eaae3616fd10. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZK6M2323040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd60f9f8368bbae953c90c42bab0027cc2fb9506b0ecbe0ed9249eeb12d9992. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZK6L2488427.