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 0xbbc9f0300def0ae442e76ed02c5ac074ce12de859be95880e69caf782dcf96d9. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac3b0ebf-b6a7-4f33-886c-b2e8fb486d93.json and https://artists.proofprofile.net/proofs/artist/ac3b0ebf-b6a7-4f33-886c-b2e8fb486d93.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 0xc0efc04771c18e7faed7b1a5f2b5443d0d8dad9ded3a1f4c266ea446c81435bc. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:58:03Z), 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/QZXL82300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddd23e88002d27d122d1c3dcc5b99b2897f2691aef8651b06d93085eb5030e0. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZWFQ2355601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228089f204bd3fc2128c26b3b8b192f35a30adcfcf5eed753e7b64aadf695b3c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZFZ42444767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f7a8178c8af0195805381f96275ea460eb6120f52bc4a603739da7af819673. 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/QZXL82400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fda41e094f220b62e9272233126847d43d2a8afe6c0abb35a797dfdba283524. 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/QZTV32452893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15e52acddc695d6561639f73a0aca24542f39e1ae4fc77c47929a2757ed259d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWV32452739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274aedc172c781f409a2819e4bd815de203c1f2a90305b90173271ad81bde07a. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZZ8A2419799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf2867ed2faf8801bdeeb1aa262903981736a18cac22f884151685abd75df7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:46:38Z), 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/QZZ8A2461153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db570e3a09e34b48f28f414f245452ba6494a5c5a21739b1cda3fd840d83c91. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:52:54Z), 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/QZZEB2431906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a5e9dc0b69a35b9ea77dd9a374da68a56abe5baf8bcf9f85a38c1dbe655849. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBRKQ2524410.