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 0x39ef89291533a3461ce815a7cfe16db889675c5954e1e379855446f9402e223e. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00521dfb-4626-4f8f-8c60-b8701ac6d935.json and https://artists.proofprofile.net/proofs/artist/00521dfb-4626-4f8f-8c60-b8701ac6d935.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 0x0155ed8061deebfb9a07f61685fbe41ce1bd9e77b47e70fd04ff809dc4fde6bb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AROCT2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0063086e8f0d1ebb3bb5712da0b4d12b0650e8d0e26c852cee05b13326c6966. 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/AROCT2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436266932dafd6604b8229241036337fc3d7ad3f47f652b5d67fdaa01e401d75. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/AROCT2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e534cd5c61aae002dce03fcc2dcd9317d04300ad9066b9984c63adaad1aa237. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:28Z), 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/AROCT2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16986455d6212dd98cf284e65167cd577696da1683dca77085e473bd5b1777f9. 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/AROCT2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddc0bec73efe212969fa108a8536a52ac2e11220d55073203c9ff0dcad9d178. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AROCT2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaf1fadeebeec34953266725a388a3a4d8ffa779afa5fd50dcb49970e107cc9. 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/AROCT2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83536055ea4d19f31273a32ec0fbbcc6c9b0573fadc15c29709a8bcfa25ed224. 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/AROCT2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa9289bba3e53cfeab403a799ce142445f65b53cb7be7e9c0b0c38c4dab82f7. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:25:53Z), 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/AROCT2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc271331ba8e6b5db8e1bee19b601e0903821fe16027610bf007c8a7c128e496. 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/AROCT2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e490a7e58e15d983db6953ac1a2c18c26200a798b67480e280f84e4781a446. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AROCT2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad60636933b3104ac8a4eaf0923707186f54a8a27a77ebe8d89475955adf6f3b. 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/AROCT2400009.