1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x4e370b76ee06f677573f2c18f518a696041c12d06a9bec37ec5a8e1c4c356c2c. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c00bc9ac-bf4e-4704-9606-43dd012d685f.json and https://artists.proofprofile.net/proofs/artist/c00bc9ac-bf4e-4704-9606-43dd012d685f.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 → block OTSBitcoinBlock must exist at that height 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 0x3f393e70eee9bc02ec00d1007cf1126286e95b2e03ef95568a4ebcbe37258c6c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOXPF1507010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e2891e28871e725f558f0c6ffc0874542f57e14fdc4101c3097219f2efb63a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOXPF1507030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eba9e92f391a8ccae363d986d3718fc4fc2c9a0b98260a99bb6b6a61ed67b4e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOSVR1401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da4ffc5d1e52ea77a63b877326bd72356498533ee09393d14eed229252d2a2a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOSVR1401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463a0b8b1725365a0e347daa13a86ffc09fb31bd56dea76dd90b1fe5e25e40ee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOSVR1401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef3647f506aa74213650a4a1e6e67675eac674eac670d2c073403605d3f1ab9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOSVR1401070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043e80943938a7a58779ca8479a8faa24042e829a07c9a8a1da9e950003dfc9d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOSVR1401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b8453543d6bf2cac3afd7dc4fc1b28b8cb0a74d8d7076b9146355d165b060b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOSVR1401100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97cf4f7e047b90297416213b0a261e4e0cebd7cc46e5950200049eda61d906f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NOSVR1903010.