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 0xe219c5d7ab2cda2400268aa1ce0e3a888f2eb7ad102a13fff2d477e0fc953c33. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8978204b-23e6-43bb-8d63-84aa8f727e16.json and https://artists.proofprofile.net/proofs/artist/8978204b-23e6-43bb-8d63-84aa8f727e16.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x86f3f0f4a2bd156d40394cc2b22216af84ffb8c484108ca865439a5e35fcc61b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITO101959583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06631c8cd0f9ad83cbd01af381dbe3fb35745bbaf8be44d91ca0f369a7dc8506. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITO101959584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa699579007dfd9e121bb7d8193292dd87bab7f2ed0ee37a0903f4695ef5a18c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITO101959588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5095c6d96ff0faaca5f29b756949134fe0c30c1b94978da66fb53be8562da96. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITO101959589.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2754eb518c4444c3e294e7b5d3d81eea6f5aa5a18a36a619bb44756fd251bb8c. 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/ITLU51731172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b6a2b9194be855f8e68fe390ad5bf7b381b72c4e7c8c2b481eec37320fc4d3. 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/ITLU51731173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce62c96325d7408311c361f75ec4483ab0a0548f8b0b0e5688f33008099e1b6. 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/ITLU51731174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8dde929540f208eec2be59fd3fac815616fa950dd8c6a7f40e04db578891a3. 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/ITLU51731175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2179f93558815bc1fa7044a4c7da87b6879267f1106f0ce412ac8dc2136ff3. 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/ITLU51731176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaaabb0919c7eb3766e3256b028b0611c9b3de48d79c461f4bf4015a256318d. 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/ITLU51731177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a86f7be4b55a94bb335139391550b8b7713a3781ff7dc51742ee4b03b82d50. 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/ITLU51731178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10c58acb4a4094a6f865aa0fd6325bf766f86c7458dc6dc66274ecdc4fa05f3. 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/ITLU51731179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd102825ed18c59862399f4a715c43b54cc45991fa2167e075face83b0d3e01. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:18:51Z), 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/ITLU51731180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f250d0d21fff600cf5bed078c521714ac9ea7dcd26e0e7bc3d6af12f76f68cb. 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/ITLU51731181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d068769d79d7e422847aafb78a5f35ea80ac9a332e252c53c88eae5ea8692ed. 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/ITLU51731182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182136c286a2c4f4255230955d08d3f723096e1ba56c3ff90ccc7c86d3276a12. 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/ITLU51731183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13b7ac058d7c7f8863883317a98ac0409323db8e3917191f0068ca9d6d75050. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:04:44Z), 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/ITLU51731184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1407c7745e266bac7ed5df6bc3f1ea6eb83cc33a9edc8224fce3db170370fc32. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITLU51731185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4162581f960e7a81d024fa31b730cf3d878f771c6aa9437a649d7610d0376905. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ITLU51731186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabd8db784f6b6eba50b09dca3cd9c8e816a04607d49e37bfccc0d67df2910b2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ITLU51731187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9c2e0556c8181e90c59000f5ac054edf13595dee9dc0aef70fcd13956ac77a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITLU51731188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8dbcddb1022663a71275f99295031c380e44900f1390e585da31666144045d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ITLU51731189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cdbcfa851340dfbde235fe5af9f175ee60e803aa65a6d5d46f353ed6037677. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ITLU51731191.
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