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 0xb829c94e9716a4a220775416a4830719f34c945986facb3eeb4be2651280fcaa. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c38f4a8-04c6-4c53-9d34-2e24f430529b.json and https://artists.proofprofile.net/proofs/artist/9c38f4a8-04c6-4c53-9d34-2e24f430529b.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 0xb9e5f55f9b49d02697c4dfd44797e48e6b1e924cd389d44027904c40e7479733. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:11:00Z), 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/QZTVM2250027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862c39688397fb04b9eae3a84fa629720321e9289c9e7b6c5c2f7801b0997690. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZK6K2312539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3f734954802506866102cc2aeba21e60a4b2aab1a26d470adbbef54b88808c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:15:03Z), 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/QZNWV2345318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077e68f665b306cec780140055a837b7db4a30dcc11570f5736e3524a246c931. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFM2399421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80aadea3c81be96794d181d40dc08fccd3c42ffb07a50cda238db4394ecef5a. 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/QZFYZ2484305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2f3d8b66b76496e6bc8094ec25e00f407e2a896b22df35fc6bde4e8c0807ee. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNA2408374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efe1a942622d37546ed5add826298203405f25bc7992440b5a1196767d4affe. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6N2479597.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34329c9c2012498f1a998b80c5f80ea329ab77dfc01045738ffdb1fc6188381f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB32449077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7853193362e215952858dbeb2f95e776023263ef8ebc615165d8b3687b5a5ca9. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:56:21Z), 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/QZHN92517516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fe1fe8729c855666164da93aedfeb6c8c947e1c76659a67185a99e33d08a26. 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/QZHN72594959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bc50a844a7ba534ab815a43d4e1e0f52e0c2b94fad9a9012001dd0a5fbe9a3. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZWFS2553861.