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 0xdab54a8a2941f82da0cbae0888b016f1faa18dad5aae0081ab56959952bdea3b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfbe63df-9b54-4b1e-8a34-ca6f4282a9eb.json and https://artists.proofprofile.net/proofs/artist/dfbe63df-9b54-4b1e-8a34-ca6f4282a9eb.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 0x5221ae691ac43cde09ab29b94c3bcb6257d897500d69e6b5be6be88d87d27c76. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZQAY2316338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fb6ee4c9a300159d77b8bc5dfbf8fde22ad51e2f12b6137c092181a02c550e. 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/QZNWV2183076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c35548b2165ba97b340d988426ce6d2abfbdad3a043a2348514f792f2baba7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNB2152025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf870623b35b15a2104f674cdf22aa07428ec5d5d76ff330ac4c98f111e5b1f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWX2444847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b5f53efb34cff6b66e98a87252a83c61e3f938810e2461c6d5ed6bbe1c8afb. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZPLS2175696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ecb364d29168ae093510e698b0d1056c8c5df4ac4c26cadd5d98a174e02e60. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:40:47Z), 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/QZTAS2159487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b500bac0ef54b2a48016c88725454f1e3e219ac0d96f283d71fcbb70d1a834. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ52103045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7fb2a1f7fe46ed0753c59e1f0b1ff9068cc50c92bb8df4fbe949c3c6a2d810. 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/QZTAT2227846.