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 0x1a680a0a7b8fb4bc9d82acfe81354e781352ecf22ba21ff11601b97bca4c2cac. 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/861b90e4-d2d8-435e-b6cb-cb54e6d73326.json and https://artists.proofprofile.net/proofs/artist/861b90e4-d2d8-435e-b6cb-cb54e6d73326.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 0xe5850cb3b20ae57c2ff70f63eeaf12465dc10ee2a732f9e1d8b51b77862414c4. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:35:16Z), 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/GBKQU2132611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d7430deb631e1276f057a90da4a24287bd57edcd034b5cccd991f3bca91584. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:10:59Z), 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/GBKQU2208178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac63e25089f0d2b323e41f55593f9ab893a1dca9afba910e6fe52ae49c55586. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBKQU2328241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504ddf70d13b10091efa292d88246725a97b13d9e49463778670301ebd49d6d3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:15:20Z), 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/GBKQU2395696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a31e6d459c0053e63ccf59175d0b4c5659880bf052b64f7c5d4bad8f6dce39. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/GBKQU2424262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ce1d2800ff90b87fc2946c15a6eb0031912eec593fcb5cf3f874d60b218d86. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QM6P42562430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130f6a6f6f7feb1e66af412aa7f4d67f02c59e2723ea13c334778569cf5ad020. 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/GBLV61919292.