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 0xe9c0ec80e0d7d23f0d031d46c6075eac1784c8c5613f5a61a3b4a4e72b66f812. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c84a423d-9411-482c-82bd-67161e1ce6d0.json and https://artists.proofprofile.net/proofs/artist/c84a423d-9411-482c-82bd-67161e1ce6d0.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 0x277d25698847eab8d6c185eeac9bcecb6381e5c818b02b23f333d405eeba2517. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZMEV2336988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3fa93b934b628b6d6f3f5bd2bef3d8477a9302dd067fb4e72d91f71c4b9be3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:09:03Z), 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/QZNN22309969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17d592b7135eb5d3aa6bb9790a69ed38bd886edcd29cfb3c8d06a861a82767a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMWW2410469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4c8bdd3626a025897db746404e52b62a556af9c82fbbe1c4c971f204a7bd5d. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZNMV2449997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d9db1d43482444c6417c3c04fc06c54e2097e0fddf926d9478c8d8450f04e1. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZNMX2431027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e3f79df8e34c6d2b55825037204c52f9a5b86e68fce9d446792e3ec928a196. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNMY2418342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4526c7256c28f872f1832d3b09799a086cadc795d67d17513c4bbab4539b9fc0. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZMEV2543976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3639d153898ad8d61b7ec838c83c4a3f4e85b647664309b440b9338ecce7db2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:14:26Z), 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/QZMEV2538935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05868c8146ae083718ec363827da76a42ae60820f5d72883843bab463b911be7. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:39:01Z), 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/QZNMU2515402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c1cefb712792d17c0c7f0a054f17d3e991faeef4f01d2331503a027271ca92. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:19Z), 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/QZNMV2509416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f8ea287ccf399c3fc04ce4ab37dbd6b14a050807e6733fbb4c2965bec200d4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNMY2548407.