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 0xabe91f1a39945c67dd028c6cedcde0e8f68d0a6530fd8373da716524b3c3596d. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb135db1-4a5a-4a64-8518-0f53d074d54a.json and https://artists.proofprofile.net/proofs/artist/bb135db1-4a5a-4a64-8518-0f53d074d54a.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 0x9bbf914f417bb4d7d31415421948c1bf278e7430730e46093fca69644bc6a2ac. 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/UKZGC2404819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5544038664d395862c97525a089ad96cd5fddaa3c4808e2af2fbbfcb4508e1f. 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/QZES61990124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b6bbc571790cd273742ad7acf6c1346d9aa3bd5ae4613da8b237d14ba0e7cb. 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/QZCE61835336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfb8de54d7b1b9501d1939577a715427045863d0bfd6ce17e1828779f87424f. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QM42K2091569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97aaeaa414cb352c7f453051294171838418c3665e273882457ec7473f8d8f8c. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:31:18Z), 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/QZHN91918283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a07627559d3e1eb87ca114f59be6a6c141543829a96d34694d0e67c8fe1423e. 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/QZFZ42289586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695e02a7a1b471c73700b16fd8e4f389f1af5f9128657948c377990e54c6db07. 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/QZCE61835324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ef5d19cb7a3f0ad96d61b01b5967718d327505553dd9346c279e607fbfe100. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/UKZGC2404820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe5aaea0de01b6fe5711b918daf8f3fb5782ff684001532f2983eb41d140056. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UKZGC2404821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfb8de54d7b1b9501d1939577a715427045863d0bfd6ce17e1828779f87424f. 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/QM42K2091569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e240ca7531602ef9956f849db60cdb87f81e23817d5079002882b5deff37a3c. 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/QM42K2074084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62c12495d0ebaac4f9df9799795898e1afccaa267533b67001767b44e5c15a9. 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/QM42K2026969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6805fae9b494b1c3dead5e63c90265c6606b01e4a315f239aac3fafe274c9f33. 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/QM42K2045623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d110629d5c655d2e2ce94db16037184ecb9d090ced96a582936ecb5e4bfca3. 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/QM42K2082595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc4fea5511061726fa5e1c88a0af6dc1f1a6e04250c9a41f1b9e2baff3548af. 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/QM42K2089068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af36266d1d8b9ef6535e7f001ec588d284e8fd7d91bf0eadf1ec08dff80eb08. 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/QM42K2068833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390e49378661c56e20b3bb1928ce9f8de0e3792820e52ff30689f4f4dc6a98f5. 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/QM42K2065908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a6ac0becd885faa5b667b109466f35e161676ef9a5a0428c44b1b20936d165. 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/QM42K2072783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3ab7fa50619a4ac77ad26e1c205a37796ca0aeb75e21b31f7312436e9fdc5c. 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/QM42K2017870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185cc8b64e83d82c22de64c6c2d8aa680982bb36b2ad95fe0d3d03f8fb92e864. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM42K2041011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a2948276d0edaa50750c3a73e57db9e8d5eea588b1e411f4586329c0f52850. 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/QM42K2014895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a99aa995d97a4a60d58b85425ca6b9b038838ba5e5bb1847450b06462b9d5a. 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/QM42K2045358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90dc50c66f0f7a9afd28d7f7eb2e253549b022508ed81379984d00af0a48f65. 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/QM42K2096459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c17a6a364a69893f32922379bffc4cf948faa7c1c631d9d8ce7f5d3abe9c727. 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/QM42K2041753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c67ec4f7d06d31bb4b83a4a56966f719ff71a71d8ae0cf17d17815233a50bc. 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/QZNWX2250090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffd2b889b8ef6a48e74e2dde8de2a8167b8b354e05c9174c1a8cc712484d478. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES61988986.