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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9471c057a99ba8dfef4ec6ade1dedd1dbc1fcb206488472951974cf27016e9a. 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/5ce7acc4-5210-488c-a7a2-0f8803867f02.json and https://artists.proofprofile.net/proofs/artist/5ce7acc4-5210-488c-a7a2-0f8803867f02.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ffd13014d81ec780adbcb544fe8fbdd4b02f119779902b6d09664fddbc09bd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZVEM2322471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778946342e42962e555f36c93b577095698d4c3205bffb659fd2c8a712c30f0b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZVEM2322472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc503ab75c27590763815683aeeff1b116dec145af7078aad56fd9da4ae1c56e8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZVEM2322467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5fb90d10f6b7669e49e1a432d0cd9c2d9145b871329be9fee1903b9cf0b864. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZVEM2322473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80eb682258d6120d9c85499ba34de6dd106f474435561553535f5dc81df8a2c. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QZVEM2322475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dbedbf897467be3ebfa3816bebbe82e972aaa21d087e07c1bc78edbf3d4f68. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZVEM2322466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec91a6e0d04e0e1b8011846927e426eb53e21a3c9e90e56e8c01f118a0db19e5. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZVEM2322469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb3a5d4a84937a84145ccf789e4aee57e7fed5bc5ea5bfb2e0c7965d0f41fbd. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZVEM2322468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798988a1ab6143ef866508fd78e3cbbfec1600ca42c27f1871a6d3e58dac14e9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZVEM2322465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaa74f7baf4a099d88d9c466fe29d722f5f298e047528f9b5bb69be688a6a92. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZVEM2322464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3de5b786d17e43ef87b5569bfc5504bd76d4fab6523a074043232c107e081d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZVEM2322470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb6a653278d83cfc0aa3507907ce8fa611521df1009c1dd1e368a8c5a183c7e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZVEM2322474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b92479ee2fcabbb90504fa780ea7243da04670c7e77920611a281db97e0d15. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS672415731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae885d24db5cde2f82b3f86b3399754a29bcea4f7549ee6f53b3d3226e7c1f9. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZPEW2411476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2252b6c090d22225fad8c00337961061946af7897004aca8ec30d5badf619f0. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QMANG2214850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80eb682258d6120d9c85499ba34de6dd106f474435561553535f5dc81df8a2c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZVEM2322475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8245817a845648c074f360a392a58a024ba8228ed3f12d8d834045fd33bba041. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US3DF2258273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bf82bdfeb4186f9e5379c1688ea87ed3561f923108d3d8c4cc2b4b7f375161. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZVEM2325880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d78bf97ad342a4cfd1985036aabdbc95e84bfaafc9d877dccc48a071fda4203. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TLREW2232710.