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 0xa65640b52f549ef3616d9809d4cb07000c3895ec16bf64bb4f6b9181331dfb15. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9a770e1-2fed-4d5b-91bb-697738ce2443.json and https://artists.proofprofile.net/proofs/artist/f9a770e1-2fed-4d5b-91bb-697738ce2443.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 0x6060f7e2e6b03e8e6bf72955f9987cd009178cc3d34a910e7ac3f8b4b55eedba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P1918632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b77770a7301711d7e3828f5dc854526f6e77a2a63f164bfeb41c7a79969f67. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P1918627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8a306941e5b3ac0762d5cc675f5329a6e626157c29528fc8d0b841483c84ae. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P2021460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5027f12ba4a7e591f92e0a6a774c5506bf6573e4a1ab05d61a46fb185b3f35. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA2P2021477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd1491d6bca0ae99f75f183c4e7ae3eb2904d5fc7a4b07e0e79def9a49f30f0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P2021476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93011554f575bbf153adfaeea85e6496f1b67a67dd503c97d38106c2141550dd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA2P2021472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7885c3716ebdcd1eb78786e47e7830340e4ac867db97ad03738bdffa92a1c2a7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2021470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87debff77aef02f31e2cb9a5f8ef134ead0760bac6a41f79f0424d2131e742f3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2021464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6202aed31257d1527ce26060d602189917efb1c08c16f5b4e58e8e7f74c5c271. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P2021463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685973b9c496bfd28cadc44f6989bb310dfdc704cd72b37bc5cfd4cb5e94ff33. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2021461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b3f8f1399805006285ce31e8a0a6a2c6c429f4974a784b22c871c965edcaa8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USQY51494427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42a1378486af9a8e3d0f866bd365f3b54626d896ceeeb88c938cb0450e29f86. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USQY51494428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfc991d4b381b22f0e8ddc5a038ed606ee445e2d56a415e97838cd604116918. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USQY51494432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e184bbe6a17d8ec335e6c3e688c240cdde5f43260935973b37d5a44b1319026. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USQY51494435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cb19384fa5a4a767a676ca9d8a61947569305869117da4f5c44027e8ee6d0b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USQY51494436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d22d39eae75141d66cf8944f9a919b474d796cfb170686791195477ac4ec7ae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USQY51494438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0865ef2b89f5ba3f77926d4817673a2bcad5831eb7e16103eff112701846fd43. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USQY51494430.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa78d4e9679ab8a932004dca3da754fe23adf7552205bcc77643c2adae2fb6a9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P1827194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf49a82a5261a0fd2faccc1616c770aa4874e588708242063af7a61f81ebe538. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P1827196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828e46ff4c3a958ded900ff3bda019d01f066bbfe8eefb308529f044f38c0e30. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P1827202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3026eb0d7ec171db3efb158daad72ea1e916767df3de68d1055b09ef03fbde. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA2P1827206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0eabd2990c0f36234e50f32ac2c7a0504895fdaa4fa768e472984c9ff94276. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USA2P1827209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fce2ada8095e890b3f8a85dbcbb365e7c7ec53c7634459f2f3f2cbcd3c3a9d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USQY51621645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a4133e22ac56565af14bde6b8df086cbd0d973b847d5e0b28f3157fcd2fe29. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA2P2208022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819d9b553c0223d7529c0329617379ae13d46eb4e5701e8d73018cbffbad7db8. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USA2P2208023.