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 0xcefd5b603ce623281d7c6396b6fa3f76ad32c728c6c07da35c2984e676b6fac0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdf035fa-0a93-4460-9caf-1932a0f98bef.json and https://artists.proofprofile.net/proofs/artist/cdf035fa-0a93-4460-9caf-1932a0f98bef.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 0x78dff2c77e76cec6c259ef7e72d740ed080f1bb4379117b310915dc1b54ae79e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/PLO161500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2214c76009af5159357eb9df3c80bb0a79a52f7401d1fae976d83eac5447fcd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLO161500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6c21beb6325932e4e9f88ca988ab6bcbd389dddcd08d3fdd34599294b4d3f4. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/PLO161500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2b5eff7115d01e2ecb74093f4f7f6698ed13473f641e608f5ac242926ed0fa. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/PLO161500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9285e3dd56fa68f0239e58acfca287b8add4e04bfd94e3c16dea0df73ab923. 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/PLB171900342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23d5de94f9abe324db4a74b91c86da20da13ccfa2bc8ea5623776673a2996ff. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/PLB171900316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1ccf221aee4f41dcb24e286b994d3870efba7438c0213eab0b5fcebf6a310c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:31:15Z), 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/PLB171900345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12335d1cd76c59f4fe7b377f18a25456cf30f3de11ebb7709e98e45767f85263. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/PLB171900350.