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 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 0xc820a305faaa1b78b9c5b19b36301d0e55cb65c5c4875261a0a9c27eeb0a07c7. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90e30d8b-3978-43e5-b721-36eef890f560.json and https://artists.proofprofile.net/proofs/artist/90e30d8b-3978-43e5-b721-36eef890f560.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 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 0x4f3d37333a33dca7f8cec5947440392ef698736cf0728368d390a719cb91a715. 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/USCGJ1609270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fcbb5ee2f0189a5e1079e3ac89d45bba2381a8f9fc147557619c7b6cc71c7e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCGJ1609273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691c0f685bec2a5a1cc4f4c2c5cfd265232e0744feecf57d336f500353f8ab0c. 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/USCGJ1609277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae2aa2c14c9faaf8faa9e84174b58a71cd3d13381b2a0bb59a11eba6a111c56. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USCGJ1609280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e951d2f1d8857815f0b2a167caab45de7c5c33c2a4292ce400e779495d9ad3. 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/DEAW51633801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fde4d2cd2b91a1881ac1db47906d27dd69b62e41104379fe6b90423818f3e96. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEAW51633802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daf87e4362fb577692f3a371ba57a73a01eae181167a2971012ac35f325bb38. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEAW51633807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584f7fd27ec75e03ab7a71201bf31eed59d1aee22920fac9927d875847de1132. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEAW51633808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37534087981bb99e84843db4e1758f057849f2c6c2906896346ad14e31f79522. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/DEAW51633811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6183d38eac78be8b8e7f799bd59cd4193fa9e9131a58f6d59513a1dd124e347. 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/USX9P0694797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055add968c6caf7dda560788a9df6cff6980286fdd9133dee3ea8af266418a10. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USX9P0694802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb3e4f4f3b342610e33f99d9ff847b8e42d5a807f160d4f5134b50c4012a674. 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/USX9P0694804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c3cdfa5d81fb1ca26becd1ddc3f9ac52cb31da5ddc5471ca5e37cb594dca05. 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/USX9P0694808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b00abcb8ceae9a69a3097bde20f793a58af7262352e730af7e2494a857e368b. 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/USX9P0694809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae89f9dbf333e6e70e6470809328f086cd0581251c0bbc56f2692ca2a9d365b. 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/USX9P0694810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1631bc749d0f3fdee76ec8e6219ef33d211c595f188b1006055a76b7a2a6e3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USHM81090543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898562f0b24e2f7e170be63d6c783b6f0137a4d30d1ecfedb6dc771e7817ee97. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USHM81090544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224c6dc1e19aeca5c71e32a7e7ac3bb0bd102e34160043eca5aa9da028a5a435. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/USHM81090545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9927949a3ee31e2564330bb32dcd20b2d82ae241ebe33778fef366e2d7f1dd. 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/USHM81090546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dfa91171f653f78ea10e226270c2b4d1fa8db71e6cc0b268f130efb2939d4d. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USHM81090547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf4d3f4c138356dc3433628a5b1fb6b949320d56eccda7c56edcc75d042e107. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USHM81090548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0390cdc1199ed0ead57ff8d60293a3234c569715cc1535987a82013ba606fb73. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM81090549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf43d8840dbadf5dab8c05f793a0f6d0b3dfbd96e9d90339e17849861bf3e24. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM81090550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1ebe9f67a080e4d6f261cab2e7c1e57fe3d759f03db379fdac158c25170e4b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM81090551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620b3c41f22669bac77b793dfd162723c9f0f50d86805d0e9674e8b1d3b5cc13. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM81090552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf683cfa6ab2e1cf5075a8151f5713601f3cc75010cb1fe5f82130b273f295bdd. 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/USHM81090553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55d1bea9d5682a968ef69a0578c81393bb36f3c31d2b61853db8285e0c70828. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM81090555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83d2c16d26be970ac66ea82279dc813199cc088dd60126981e366980bd4afd3. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USHM81090556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8711706a524004eb399eafa91dbfd5afb1b70804cb06ada85961873ac133be1. 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/USHM81090558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11701ab955d0f37d70713ada088fa37663e79dc885a6c00319041f0eea9b4e8. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USHM81090562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9413d01a90c3be8c25d5d4164f45cd5233c7a4bf8225340e8426a6a83ff324d5. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USHM81090563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53881a2d86ce94cf6d5e37e17bc3362756b21bf74cea32135f35abb086fa44a1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USHM81090564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb334077e5ed9ab043c134ab3f088d536b2a576461dacb9bd24073004b7398e51. 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/USHM81090566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679eb97d78081413aa2ae11b6cea1d0d470d61bb4280bcd3eacbce8724790a8c. 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/USHM81090569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c3c9ec12999e44afa90ecece968c8bfc5b8c986a5f314f87d97e2d4341a8ee. 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/USCGH1695174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef79c4f6c988e886913abd0eb1f5fc0574748999c63076316738b5ae795eb96. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USCGH1695175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f9ac94bb754ec6dd7a6e2120bf92b44fc43e92aed5901dd8b1004abc244ebe. 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/USCGH1695182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0439a9314f6c891089dd7b42d971fb6d2b89da1ece0e6a865b9ff43b391d21f4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USCGH1695184.