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 0x79b4d9698eb585db69378f8182eeced648fd63040828ec5b52bbbcfc02a8822f. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f935af25-9a70-446a-baae-ea560a01756c.json and https://artists.proofprofile.net/proofs/artist/f935af25-9a70-446a-baae-ea560a01756c.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 0x502422b7955d9996e9c22a42a5a7fc8e319d2ca829ae39f7375e7836b8ccc3b7. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:08:22Z), 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/QZZEB2416747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307359166553fe73e74d84c78b74ec8944e21ee6701454bb6f8e4934c7d0e1d8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:32Z), 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/QZ5FN2517601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e7677d0b9bb76cf2ee0ad4faca945faa208cb1e2bbcad43ab0b3883de60ec1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ5FN2517683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e338b2d5bb9e6ae9b99d025e4b64f3c6ebc2db6e7a3293a7810e8fc2c0a196. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZ5FN2517704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce6acc46f87819f7d2bebc550a2ad2fd70fff7d45fc0ec46cdced51bbb362b8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5FN2517708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590f6d0a1bb8a8bf0c85712fb650db0c3183145ad48b01f4becd5d6df7698b7f. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWV32518725.