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 0x02629123d0fe2efde62a9f675ac51a96bcad659095bee4f50188d7ef4a06648a. 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/3c1c9b08-ebdd-40f1-a2c0-ae190346af3a.json and https://artists.proofprofile.net/proofs/artist/3c1c9b08-ebdd-40f1-a2c0-ae190346af3a.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 0xb7cdaf3bc48fbf0f9b7495ef3a9e40d89add4360c0f51d47ff9e5d53be0fb8a7. 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/QM6P42493351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b3210359736c8641ff49a649b8192a5cab369e8f395b46024916622281f7cc. 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/QM6P42493355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4288b428d8924afa2012a4601183369ddeb1e0217102077259fdca37e65a80fc. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM6P42493348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a1e5f301842b5fa60fd04b27d0cf6b4ca5b75ef9b34353b7d89e39a5436484. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM6P42493349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36675b2d0d1ad20c4f2530b4cf9c4eda54229d615a8589fd0f5398bc310a76ff. 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/QM6P42493350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1678ab9171245504dd6562cdc8b1108e50ce76a63523d7047540d933b698e46b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM6P42493353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba764d4567b36ea238f4ce21f3fc791576e518a16e30abd293aad4b9cd18472. 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/QZNWS2455492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb203d5df89bc297f4b5c50dcf7e964495e3303db22d9611654bb1f5a6f064ef. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZNWS2455488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfa287aa0a287279cb393cc0ac10dc209f2eb5da41402184c4b42fafa0eb534. 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/QZNWS2455489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1f541e404e56aebc68ef118a8802ff08a7fb5cdd7cca01156b14f3f5f6a646. 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/QZNWS2455490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfdb59e147a59a4d7be2e7e69f1d67d70ca62e208f4a9d16ada43c623f7a41b. 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/QZK6P2435989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa216c33f9b1a3882088d59cc2b9512dd085a9f6c544f38a5b29b0cf68cf5230c. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/QZK6P2435990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603963804ef2cd82269f150db773db152f6b26512974a6acf01a8152c8d497b7. 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/QZNWS2172935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb0a5ace686726f4f1df8bafa2ec1a1e2e364c0e3cf9b849898b4f4870f2eb5. 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/QZNWS2172936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e25a1cee7916ee808234c5811cd230da2c07f2485cd5cc4986f7966c057d26. 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/QZNWS2172937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb799f023743acba355a3709a7206d280551f8a39929390df618d78cdecc88a. 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/QZMEQ2150727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c14b3902e8acfe19fbb4df8328b44fdf4bb7e41bf36d97562c75b51fa41851b. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZNWS2172938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497740c28d17a2df21180ccdc204e570990d968aaf9375f96b925014dd65c37e. 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/QZNWS2172940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24162ddb9f56b9e5b27772831426a73dbaa5a2f9641bf056fdf4816644c3aec4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:02:53Z), 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/QZNWS2172945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80cca04c2468bf3c5b2be457289bc8c84224fba77f72dbe89b0db2f089d5fbf. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZNWS2172941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cdaf3bc48fbf0f9b7495ef3a9e40d89add4360c0f51d47ff9e5d53be0fb8a7. 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/QM6P42493351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d85991379a15a87b521ca8f08e057ff3d0d0aacc0ba3e356d6ad0705cc88a2. 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/QZTAS2218438.