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 0x16ef3632306d58c3f58c9152dce7b33718e7e55a6a00b5d0a57833b73b8dfaf9. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a14f428-2f4a-40c8-a067-36258054a724.json and https://artists.proofprofile.net/proofs/artist/9a14f428-2f4a-40c8-a067-36258054a724.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 0xb4b7ce7e66e72f4e09cc10ab047de7396b04d63aee851122619c20f60869c0ce. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA62259366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db473e09421e7b56a5e46dcb97509d449d12121aa2b4fd3960c3a09eb0af711. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZDA62259367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7efe9e43910eca16b6203faa9e1b6d5fb6867eff9483171834473d700b3d05. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:43:06Z), 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/QZDA62259368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87c101487a34c284bb3cc9c3c04d7c8f40b8720955d6971147a17a354e1e3f5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZDA62259369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b042c72e3d0a797003327241efddb6dec277e30800c9551bb0e204aa7c905c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZDA62259370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1408cfe73718f948d5f41810081ca85b5d4e711f0e0c8f75bcb3913fcf744f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:40:51Z), 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/QZDA62259371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33f92488483c8e10238a1f6eb72663dfb464e43c7da7900ea89760f47b16e65. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZDA62259373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5d7560e6d840cda9396fd39b8bb4e71ad26b28a18f4bb4bbd220083e5e4203. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA62259375.