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 0x296fd92fe49410d5014bb8e97bacc63c131433e15c36353c302998b87f28088f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c06947c-4c5a-42d6-9550-a09864672eb5.json and https://artists.proofprofile.net/proofs/artist/4c06947c-4c5a-42d6-9550-a09864672eb5.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 0x0b2bde663224db04a8e4be28ad376bffefcbbdc525f0052932191daa8cfca1de. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCML02000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf197d79e0a703af5d2ae6887db77c5366edaefef7d6fa4ea9a8e5305cfe5c0. 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/BCML02000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4dec6b64c8465cfaaee091feef3f85be3d5aea3d7bb520f926c12c5bd7a416. 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/BCML02000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9dccf73646026167e838d93827be85eaa3dd875cc127edccc101294f614687. 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/BCML02000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a0864813d7bb96a4bac66f87d86b98112fbc02ebd879a31bac3cc148027a9a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BCML02000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0a75a4902117f26fe521486372d62170dff56c7eb4f54f194b25f3761a3ed4. 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/QZTVM2153400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62df1c5843069f12060c82e7aeb58b25d40ec90986750f900ded3fdeac2e3763. 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/BCML02200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724394f03e5c9b18711ce81bd042c27d87ade63c0d948a5e0e1e510bb2fe77e9. 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/BCML02200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be85cfa889679231c7c8b8190e9628ba1291a6b978a6927d6b9cc35fabbbde6. 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/BXIV82301601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30038dae394130effb477ed70f9b80f6bb515e17ac9fb648b7ee87cea20e8184. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXZDZ2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30247b03a476c9238e0734c45e6e66cae0ef9a0a1eca3d05d5cce60009a1352. 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/BXJ3W2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdee7ae905e387b0324ce0bbee4c8cec6e66b4c7b2b55431c85c2a9a54d3ffd. 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/QZGLS2417089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a07ce72d8921a0a59773af8fa3540aed2800cb4dfa3e054200be9d1438e780. 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/BCJRA2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a438db08f001714409e2db19488c887d0b6acc80e5a40f42fe5e4ce9ba0d95. 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/BX75Y2400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f447bd4d577ce27aa6a7a896bb502599646b0abcd36d705d44ec6a9dc2942cb. 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/BX75Y2300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4488780e86d4257ab15140d2491fa5d91a7552e4060fd6d3c0cded2aeb24a6e5. 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/BX75Y2300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14660878e674e7dd8ebba12363bb6ead71556ead6396f2b4bbf035379362a3b8. 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/BX75Y2400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a438db08f001714409e2db19488c887d0b6acc80e5a40f42fe5e4ce9ba0d95. 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/BX75Y2400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f447bd4d577ce27aa6a7a896bb502599646b0abcd36d705d44ec6a9dc2942cb. 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/BX75Y2300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4488780e86d4257ab15140d2491fa5d91a7552e4060fd6d3c0cded2aeb24a6e5. 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/BX75Y2300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00876cceab12e2f2b579a0e1b8a024c4cbfb60fce52d3b9d6f3905b61a414476. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BXZ5L2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437e508b6f794fd3119e3a58fb493f620f248cdeb6aa75e27892c966be27d441. 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/BRQ4H2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c42505a621bb34e6d28e6c10b158b8e1158b985398b189cd05bb8a7ef73f712. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BX75Y2400170.
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 0x762dd50bbd7f54c14b4be785cbc25891c6566cfda3e5344a0dd5d954d342e179. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZGLS2344792.