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 0xa01d2bcea91071aa1f4748bd93db16f9f227c801efa4c1b3f8ae6bddaee49559. 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/ae817889-f4a1-4163-8b44-96fd52f59709.json and https://artists.proofprofile.net/proofs/artist/ae817889-f4a1-4163-8b44-96fd52f59709.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 0xc596eba4d360e3027017b07a75b2fe78e1e0dab942a9672dcfc285dc0cb84617. 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/CAC0C2300864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e6b58063d0d6be4aab4121495ff031a53cf7a52f713c9c13aac6b693aa7748. 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/CAC0C2300869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88112bf5e0f9e603d7010f3361feac83daa3ea2f5f397c61025567ce53235c78. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAC0C2300865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16c423bf62b2972a35063c6e20a6513843412e58b5f97be466009482ef076a5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CAC0C2300866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d21842be179796825f53e77121292befcf89bb043afda7185f2dfc6c688bc0f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAC0C2300858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03f9557761940cf66c22947894d7eddd5361d8ecaefe083af802284b2384622. 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/CAC0C2200807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69fd3eb0cb22ec344fc99466cfbbaf581ae0e60a5a47fe111c5cbe9262443b2. 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/CAC0C2200812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4264fc89642715fc3801b8660de4116e1b85489241506873c8be32d018cc6ac. 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/CAC0C2100656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee421f94fb3244a17b545b0284c000a19d4b165b13b4477a811591f289733271. 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/CAC0C2100658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf0ccf5756843efcdafe9d927c26a9954fb21795dda343c80517046f27a1b85. 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/CAC0C2100622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26e21e7fe4411c56f6c720d72ded87da60f553caa5879c3b32a7128fb47ba56. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAC0C2100660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b44014b789382620d19cd75336e3129d9409388cbdc4802c783d0a81d8b6b21. 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/CAC0C2100662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d458532007ba6ef0df4a7bd1501fe2541646fd9f0d432f53b75b84b759e7c02. 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/CAC0C2100664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65f62c3dec6f97ea6bcedb0e293a225396a9844a7bbb0d8c83b6294450cc6bb. 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/CAC0C2100665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e8d3a7ffc205737c12eaede8a606370b40dd0282cfb24c6603b8e8f05ab8cb. 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/CAC0C2100667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16c423bf62b2972a35063c6e20a6513843412e58b5f97be466009482ef076a5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAC0C2300866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88112bf5e0f9e603d7010f3361feac83daa3ea2f5f397c61025567ce53235c78. 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/CAC0C2300865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc596eba4d360e3027017b07a75b2fe78e1e0dab942a9672dcfc285dc0cb84617. 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/CAC0C2300864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d21842be179796825f53e77121292befcf89bb043afda7185f2dfc6c688bc0f. 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/CAC0C2300858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf0ccf5756843efcdafe9d927c26a9954fb21795dda343c80517046f27a1b85. 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/CAC0C2100622.