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 0xd6ad97382826afeaf650649b8bf4e705ccbcbea084ac5e79dc94c5e43fb36ec9. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e459044-319d-405c-996c-57439ee3693a.json and https://artists.proofprofile.net/proofs/artist/1e459044-319d-405c-996c-57439ee3693a.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 0x3a36544011cf24817ffa053b5f613369d29ce377c638c20395a173bb2b45e533. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRV601800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd2501b53a600f3a0fbfc1f00375626cfe478f01bebc0515b2d657a3d3a6a4d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRV601800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e42d23ff7ed216289c64e9515ebd7923a8cf96267b791daccd2a72d59bc965. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRV601800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41876121b297f857ddfd9b0dbc3827d171ead81d5c9b8ab3a0d9185543396a6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRV601800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daf33ea729e082abcdf529f7b627713828da53997b0475e18656e6d25b23242. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRV601800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a36544011cf24817ffa053b5f613369d29ce377c638c20395a173bb2b45e533. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRV601800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd2501b53a600f3a0fbfc1f00375626cfe478f01bebc0515b2d657a3d3a6a4d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRV601800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3270e6aee0149ac5e709482b5a5abaa9a32ea53dafee4ce3561cff7a5576228. 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/FRV601800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3db800ca5f3563e11fb6b7e37cc3d8201d4f6bd1a18301b05baa514c21ed4a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRV601800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41876121b297f857ddfd9b0dbc3827d171ead81d5c9b8ab3a0d9185543396a6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRV601800038.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41876121b297f857ddfd9b0dbc3827d171ead81d5c9b8ab3a0d9185543396a6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRV601800038.