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 0x3c7b5a45c9326fe48fc3e6dbb04ca13bbeeabc6e234e4d99aa549554d1469918. Chain 2 (Bitcoin): anchored in block 953627 (2026-06-14T11:43:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f53251e-04a0-466e-a44e-851e0672d1d2.json and https://artists.proofprofile.net/proofs/artist/2f53251e-04a0-466e-a44e-851e0672d1d2.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 0x15d4c60ddb419b1fe63ef8508c54108efa87ebe49eb597ed5dd8b7e68d1546d4. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/INA170000166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833bfa0d1c002e73effe8d6a64a038b13be238be35dc1c058f7e69ccadc11e33. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:06:23Z), 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/INA170000167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4963a9bd8a306423ec9586f89bb30175a7a93477f01b2a745922a19f18465bab. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/INA170000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882d05e6b3f4b53e7b114a267a4b5d7f5aa8df88132fc5db6ca57d18a0d90d31. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/INA170000169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb1b55b6e1f9b03c5cab832e1d49450c9c63e8a2689282f3b693a888251a93a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/INA170000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb85ed120aeda795af58beeb538bba2250165f9d5e7bb0a8b88425c4427713cf. 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/INA170000171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05aae0c5e914a647ecb79c0ac78079b54f61baf41aaa7bd4ad688e7750a44c7d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/INA170000172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef6ed6fa50edea26432e50e6578a9a450a88e6d75bc4cb46dfb59d0fc6d1b7d. 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/INA170000173.