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 0x643e530de808fc06e316953dc5834d3b746f439fcc52dc746e713e9e9efece94. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a5433a7-9abf-434c-ade9-a60a73ad692e.json and https://artists.proofprofile.net/proofs/artist/8a5433a7-9abf-434c-ade9-a60a73ad692e.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 0xceedcf7ce5b01f176ff36f6e70bed93321837210ee191a745f98ea783437e76c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:01:18Z), 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/USPUP0812912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fddb4a3c4becf56f26cc0325f240b551f2a170b34bdfd1793179f7d5fe6296. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:18:48Z), 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/USPUP0812914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440da659c4f429b44fd84ff4c1da56f6453b433e7e10f50fec9cc5b36d8bf00b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USPUP0812915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e01e8f0a41ed83e2a50e7c4a063829f5434118f22ebccb6b540c90e7795387. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USPUP0812916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32ddf703ffe0537c81a84bb4b5f7b5504fcc516702e17fa4d2affd4ebd9f69e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USPUP0812918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4ed92ade3195fd0525accfbeeb16cfd2fb4d3419017c68a0b72707d98f31b8. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:45:46Z), 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/USPUP0812919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917eb7f5ee566fafbeb1c507804e769d011ee4a5516794f605328fc9a44c68f1. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:01:04Z), 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/USPUP0812923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394fbd993ca661e1433ff1ae18e1bb11e6f705b56ad6f0e7d74636846e1d2755. 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/USPUP0812931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0334cb72a916cf997d4f231c28b7116be23e824129e9bb84dbf9b734651e9c37. 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/QM7282362421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46992692423f12def4e769d45044121351f771353fcefdafb098a4b6d0c04cc. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM7282356608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc044773a32afa644771a4df9686f3cc381566026be6b858df9dcca84fdf4a685. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM7282356611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf37b0b75c8f39b0b812edd073bde2ca3a622a530f4e73e9462ca58afd3ef332. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:02:12Z), 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/QM7282356612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3b060024e058fb38b10e10e2e8317786403abbaed92550d2d9a72b78fafd32. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USX9P2434776.