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 0x5380daca070ec0806e5b5f984524fb6c1ae598e974242937e93710ff9faeb44c. 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/676f0c92-c161-4d50-bc37-96ae67ee3fca.json and https://artists.proofprofile.net/proofs/artist/676f0c92-c161-4d50-bc37-96ae67ee3fca.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 0x01ef97acd50ee5c821ed9901cf934aa055f965cdf9ae7dfd95676e1d2ac08c68. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:11:06Z), 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/CAM461000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dea4b1d7e22fddb52dfdebe64f680191fb3070b04b53fa5e622b27a71ddbae. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CAM461001562.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5271b4001af99ffa88a77a825d7f792a4f50012043a5ad8fbb3e55734f85b02b. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:28:28Z), 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/CAM461001597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd49cee301cb2b0f5ea319dea4ff4c5d516bc2a3842a363d78e1a899e6f65c73. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CAM461002402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96282bfd1459c2edc38fec48194e65f1ed0de91f505eeedce3404174d5b791e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAM461002062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6223924f12c434caa235b36d49f0942d239d30c6963542d49c5a3e126fbdcf10. 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/QMVRR1101002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b0e8ba56147ed7f58172923e0acaac6db0acef2170cf0a8ec1da31f2924e26. 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/CAM461002061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9debce589b0f7f1f7d31cd8864093e4a7ec05ac0edb0f053d4ea8649a6afd04a. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:07:12Z), 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/FR0W61742204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd61eb16095bb0caa5ca8faca326c369eff55cc8f9d17bb67c6eea810ea0c334. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/CAM460438609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d5a8125611cab43caaae68fdb1265b819e71b8f8ecf32521f60a330e0258c3. 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/CAM460801181.