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 0x711f662b58c873052815d0672b0b7b86bd7b89087b1c8bab18b519b4f3fbbb47. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bb779f7-47cc-4359-a507-5a6dc8e2f6dd.json and https://artists.proofprofile.net/proofs/artist/1bb779f7-47cc-4359-a507-5a6dc8e2f6dd.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 0x2d140406777a3320bc6eacba9c25163e7d510728b6ea6b366f838a2cd3c05892. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLRD52023337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093e79dc8b1b89e262d008b26929a830a27478b01f8dc327c1bad3ac9e6ffcc6. 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/NLRD52023338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c39d7b514822ba8850ae5b9aa56c892499dbe757d6b2100e58036ce24a4709. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLRD52023340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b9cb4ad8871ffea29a168da3b1605423789324c7bbeec948b9a383b7b022d7. 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/NLRD52023342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d0aea9dc438297045a3a07047e03e72df3fd42155703d50b9ab302d19400cd. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NLRD52023343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9736731d17ef459bc3980af32a4745cacccbdc6b7492875080373629f2cf58a. 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/NLRD52023344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd9e0c00783a1bf406f7d8daf968e8b12b0a3979a67522a35c69ea501e96515. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:20:43Z), 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/NLRD52023345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dcf6707d8a7042fd672d31927cbf07c64eb98ab3b49c594be7f73624daeb5f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NLRD52023431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e5c657a5da26a5a4295c1ed4aa039dfdaff7859885214891a34466c3355fa3. 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/NLRD52023630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2215a279d132fd43952cb0e9786ee888a4ea7d99d0ddbc904150f51831e0a8ee. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:07Z), 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/NLRD52348050.