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 0x5443b59ef9745ab1678d57828accd4cad9a52a5ed0a06cf40f65de15e7fb258f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/438b0995-032b-457d-9e6a-5c25d3a7b798.json and https://artists.proofprofile.net/proofs/artist/438b0995-032b-457d-9e6a-5c25d3a7b798.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 0x5e2ec44bbefa3e7a28d526eb9d5817722d0e916e44d9c3a2ecf6a4f2a890bdbc. 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/FR5R02401388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dc7530a1aaa502eb974ca78c17157e47d195fce78d80dc5d5acbb069a092fc. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/FR5R02500490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a817c1ecb599a3d4da9b072859b1399ef4a4bad8ce976aee18df2a8044d9b41. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR5R02500491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae090123a2aac5a7d221e090fa5766759b25017db29f460999474b9bf0effcce. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:34:14Z), 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/FR5R02500492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04938cee90516138394aa9687439eaeb17991c819871f92173810a1796e9636e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR5R02500489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0c30907ab05f91bed4326b8ea7dbc441cff24edf2be8dc3f496ea50c2bba17. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:33:48Z), 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/FR5R02500356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a053750253c328773703e34b3e5cee213821ce3e5166e9149b0059b49b622f7. 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/FR5R02500493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54a94054f5a136dc27a90b4fba73d986dabfd281645245f29e618b3f11c946b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR5R02500494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bdcc9b529cfb218f73525a16aa3f344eb15df9a59e9c5711f13dc1e6d65fb1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR5R02500495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0374ba9c97ee0832261ba6231d9d79067d6a6b9a5245b923c2bf635438842003. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR5R02500254.