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 0x619b140d8335d87de864186915d7e639d6aebbfae0cb52338b25888bec943563. 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/b62d0888-4761-4bcc-98c6-9381f85dd470.json and https://artists.proofprofile.net/proofs/artist/b62d0888-4761-4bcc-98c6-9381f85dd470.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 0xdf16b085ba2fd3080fbf8ebeff0c2711ef1b71ceb02c5a194c656664038ae906. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES52580446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00c6738cd1cd50da053cda7b97adeb8fc57bc5fa5165e9720771c547f727fc0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES52580447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb3824e627a35c8a4186ac70b6c7df6a526968874fb07c332a14a78a26d90c0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZES52580452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63075f81b4c75487cf29ebda49a869a451174bbbda291117f4b2543ba0c4563. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES52580453.
On the Atchison, Topeka and the Santa Fe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2723b3a1b13585132b1a8b34213d6b5831ef16b66776a7d62659b97b858876. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:20:23Z), 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/QZHNC2589992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d7a8560291bd43813c1a9f1b59e1ca5a326fdcb7f16c8b4736d17067be1015. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZHNC2589993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dd0c4ce0b1ce882883176d52c4108c8652db2a7ebb8f448e5e6f18908fb314. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNC2589994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f97386cf37d2c0441943239c502d815b229cd3b831f47235ea68bbf36b8a590. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:55:31Z), 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/QZHNC2589995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f921e487b1d0c4210e8836436f508fe49f34a955b78a4574904e80d745c54cc. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:08:31Z), 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/QZHNC2589996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97164dced4a5d9e477942e401078d287f517b5e2c13538587ee60cfee1e4a4f4. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:46:20Z), 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/QZHNC2589997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc647ec4023cd1074c3f9f6088a9b8c009fbbd0db9a2bcf83c4b88adb6c750a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNC2589998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70fa3443d8ba1e24d23bae7e622c4415c399f85bda8da121112808c1a2aa885. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZHNC2589999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae19c71ed942fbe27619616509af9c2c490f37f70bdf2e7f3a6680428a1e958. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:54:03Z), 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/QZHNC2590000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c1ccc5db58c268cc053b27b7712703ed0703eeac9fed3b869778d865d68065. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWQ2535945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f41206c148b05b3c201a7acd0922f06d1a1038bd260e641d970665caf0756f8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWQ2535947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4233d29e04c1f42f699ea22967926a05582eb536e082cb15fe260f82f411e640. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWQ2535948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6208e7f813fc982b6f6bf58603cd416aac01cb94c62ae87dfaaa0bc05f532a3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWQ2535949.