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 0xd2167bcb9ebfcdaccda1b4850dde0c27c22fa227e8827db086c5f05c4f2392c1. 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/c2e60386-b24e-4856-94c3-684c86f0c8f4.json and https://artists.proofprofile.net/proofs/artist/c2e60386-b24e-4856-94c3-684c86f0c8f4.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 0xabde815f94b2ed62381fce6996a189f28de4eec7703ee6ec69ad341d522cc15b. 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/QZQAY2497039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72ecbf82e912a4c9cc0c6d3817f4659c4883d4ba9793a5b145fa15e3af289fc. 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/QZQAY2424635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9068169a22dcd6bff4207e82cfa730310e08f043b9d62f3c3ae6e3fc933afa. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZS7J2304165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651d3bd6a719be6c0ba79b7dc9f75bc8a29735f01a90f8a5a971878fbed9d59d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZS7J2302066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d6885f625f3007a7962c470fd0563ba9341d71c218553d924530c2f46864a2. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZS7J2300851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630bf246ee53bd659c2ccc22992b405edf2d268c610bcc4fbffcd4f17931f80c. 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/QZS7J2352784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faa174853c8cf3d5eb73a65e1768f686b22c69bab890dac3f92466bd3ed1acb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZS7J2382842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cdb3971e170e5f2d9ee45c9482e9651c2bb85ac7b98314c31d02093038833e. 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/QZS7J2327389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ae56b51cb01ab121ddddf9e3f69a8f6ee3bf9d6af2e7d52ddc58102ae1038c. 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/QZS7J2352441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536b3f3f463ad8298cf7ee8a0267c84c0e1ba2cdcbd70894303640425882b368. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZS7J2314778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9068169a22dcd6bff4207e82cfa730310e08f043b9d62f3c3ae6e3fc933afa. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZS7J2304165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651d3bd6a719be6c0ba79b7dc9f75bc8a29735f01a90f8a5a971878fbed9d59d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZS7J2302066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d6885f625f3007a7962c470fd0563ba9341d71c218553d924530c2f46864a2. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZS7J2300851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630bf246ee53bd659c2ccc22992b405edf2d268c610bcc4fbffcd4f17931f80c. 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/QZS7J2352784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faa174853c8cf3d5eb73a65e1768f686b22c69bab890dac3f92466bd3ed1acb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZS7J2382842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71dc4c3f13a42c9db4cc533df20da88946f406c712dbf77ded5d0e773a8292f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZS7J2323514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cdb3971e170e5f2d9ee45c9482e9651c2bb85ac7b98314c31d02093038833e. 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/QZS7J2327389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd586cb103e040a5f23c57ec06a3aed4ed1dd25404e3d50b35f887640f2324eb8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZS7J2344395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ae56b51cb01ab121ddddf9e3f69a8f6ee3bf9d6af2e7d52ddc58102ae1038c. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZS7J2352441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536b3f3f463ad8298cf7ee8a0267c84c0e1ba2cdcbd70894303640425882b368. 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/QZS7J2314778.