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 0xda5e6ff4d54d183a88bcf584fc70913c15cdedd95fab776836819e2738b9c0d4. 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/f3fa41c9-4714-480f-a833-4159207aa557.json and https://artists.proofprofile.net/proofs/artist/f3fa41c9-4714-480f-a833-4159207aa557.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 0x96f5cd973ec2fde95974f025d9082911d7d11a74034b9cb999c1af75ea1f2f1f. 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/QZHN82035986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423496d7a2be3618e44e99997b1a2bafc8a8af8eefe600cb90d08a69dd68963e. 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/QZNWU2049251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ea301844375a89c8c8b18cf6bfd17477bde95cc6dea27d9b621a5f0ac31849. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:07:43Z), 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/QZES62171095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda6073263169c19ae0ddaf6067c8a8e1b4c03a46abca07d041a38cc6e0e7870. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES62171096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f124accecc6aa931e33947515fcac02d51cce4d2eb778cc81b11b61c2a111f1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6J2254731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8126170cb7ecff59a72363ab2c1a32888fe2db2dc595271b266e1c421268be5f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6J2254732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d81e3b64ca158029a66464b861a815a95f81e5d013af9c191816a24613a136a. 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/TCAGU2329149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dc231c4ea7dbd1dd5c2015b02af006d17225816643005f7040fc046845585c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZMEM2354299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bc12d3bafcb7814ea5b0806bb96f0530191773de7b12ec45f6119a3bea8f76. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWFP2341482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f269c01cacc4cbb97774cf71b3ca12408fe3de8baa4760ec5fcb4ee68d44669. 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/QZFYY2478881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642c44a9d4e8608d50e530bedf317579a76aedea585d6e55bb3501d47cf5b2bb. 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/TCAGW2361296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bb40b8c821d9703307118b186f51ed33df702219193fe517d4d1688c7dfca0. 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/TCAGW2361336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a87abc05a49bd493de149b7edd8697f9d0dc71cc0cd3992152d9f338227ce0c. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZTPX2460810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a1a25a21e294922ef3ddfe1549f959968c0902badcebb820b82dfd3ef32fd3. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZTPX2460812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1532aa41e909d22530943227cb49105687094d7371123b0a6c71b2791a0c7ade. 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/QZTPX2460816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445c5194a72cbee6c50cba4f442ba783bad146f1813461d1551778af0acb9549. 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/QZGLS2503383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cefb0a60d18e2b61ec4a29eb4553070437d4a95b9824b2d7709b9838b78fabc. 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/QZNJX2590846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb02ec613a3bf9df9d8816d792368b0975278cb2e25c8db669f91881ded3e6fa. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZNJX2590843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c36218d369988b82bedb2a62dd8bc497b68484f258f7fe93ae86b7375a14056. 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/QZNJX2590847.