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 0x71efbb0f9983d6de2dc89f13c8d42b4dd8f9c119b3bd19a23499c79f099b4abd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd72cc91-8d1b-4dce-b325-ebbfe15a7558.json and https://artists.proofprofile.net/proofs/artist/dd72cc91-8d1b-4dce-b325-ebbfe15a7558.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x9e83378d321720f602e7df7c78ad95ac154e7d71f488a2e9bd7c33bdd9448305. 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/QZK6K2314150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0467baedcb70f531733fd6b4575af45f6cf2b5681ab568e3f7476577e408ef1f. 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/QZTB32308893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1e9b913dfa17c152602e4e2ceb89f4fdde5580c115233816702f61d71a8577. 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/QZWFR2325666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c34a4c4ab26e32aca6b13102d4bad1e2ec853425d841fc0f36706db169c9eb9. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZWFR2325667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c39f05c0c4e4b066275c94e51d823523c2b0eb7a6595c4584d65f8b65f8139f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZWFR2325671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f13f733c63e7495cf2c4e5ba8b080af0a71fdc5ba0ff86d04ae06d2a6fb506. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFR2325673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd03560ff322ff5d15886d683300ff499671c93b5618f79edff5515b2f90f46. 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/QZFZ32463844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e26271b80f1eddd61147f2f96701235b23c5ac3e65d7d3cf359001fd12b113. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:37:07Z), 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/QZNWR2369541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ccc051cac7b3f335f061a36c32a2af99fe1eee41c3bbe072cab636d2c31227. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHN72479554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfcdb04cce918d49e0c244535a8cb60b6451cf44609950d2d4a5cadf8d315af. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:04:16Z), 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/QZTB42417041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08397e9a026f17574399b47b7ea763271b8c1e6266efd4e3009a350e91e57973. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:05:44Z), 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/QZWFK2489335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65058cb720a1595a68dd0a721536d45dd34462294686e6c98d2391697efc781. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFR2410681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a0d32e9c9ae20d9d4ae9a132a548cb01d9302f14350a902958e122075d1acc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFS2464697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe1544894aaa27654cc6bd8f62dc39ab7580e7f7b09bef6660fa39e3383fe54. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFS2432422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92e09681894a99e10836e80dee806676134744f9a11cdb9b7f990d47b957a08. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZZ7L2453328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a51903502bc8de094bda0bbe3c536112b9a304943406e343a9b8aa2fb87374. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:41:55Z), 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/QZZ792487839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9581da852be1025d79021a5977c0f6e10d3365df145cde1e799d379b4a40251c. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZZ7T2438096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33a97f819db096e211a37f4d686cd6d648401762a8512bd134350bd2537e412. 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/QZTAX2574798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc682d227f3e2220e697f15cb63d0e33344fc6200b534ecf0550e36cd474555. 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/QZTB32598877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b3480429d481785b57537c16b6880f8c4f4c80de9205bb740e62ad26ed14f7. 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/QZTB32598882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da85ae1e9fb0bb00a0c33b457570d4f76f4c92950682884fc1db8b3d5f2e7ae. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7R2597352.