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 0xfaa9211b3417a3abab2ad05dd4a41743913f7e1da8dfa304443497083fb8c6bc. 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/963517c7-4434-488d-a10f-059869df6373.json and https://artists.proofprofile.net/proofs/artist/963517c7-4434-488d-a10f-059869df6373.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 0x1ce75b251759f4eb14d9e10526ab9c029dd5c60b50ce1d7738fc3ba28d3dd1ab. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/NOCMC2404010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251205198a425bc83ead39b4e7bfaf40f9629f1284041a3352e2da4e698cffa2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NOCMC2402020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3096f85163fea6ca0a2c908f70730a2794d27687628637ef16017a8eb748a5f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOCMC2402030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba6293d6bf5c86ed8535cc2cf321345fec3d4233ce318097c6780299bcd5916. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOCMC2305010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf158bc6fe8a342de542a50a7078c27d967c8496d0fe2cbac4fac72665a568cce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOCMC2302010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7107bac4a14c81564622689b10137607e303a2387a2abf718cb7b24b440bc52a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOCMC2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba6293d6bf5c86ed8535cc2cf321345fec3d4233ce318097c6780299bcd5916. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOCMC2305010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7107bac4a14c81564622689b10137607e303a2387a2abf718cb7b24b440bc52a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NOCMC2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf158bc6fe8a342de542a50a7078c27d967c8496d0fe2cbac4fac72665a568cce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOCMC2302010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac65e5b1a2a8ca0fea856a55560bd33abc9db07873288d8d3de551a9c1abd578. 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/QZPLR2464900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7296ec189594374eb66e30cc435e2b2065809cb5f9cb6581c2b2897d6fb6b41a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOCMC2501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e8b4e6aaf78f1d55399cb045f4b47545c6d547f7ce865d8211c921429f45b2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOCMC2405010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf793276f0de21c50f054f77b80c87c40e92f9712ae8085444b8a98fb27c791. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NOPAZ0404020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa572f5959710edfe4c5fd5a53dc86ddf49b7158d6ded6f87a3049b93bc4e2e03. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOPAZ0404030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629937e65f2f64feb3e6da4e7fa96e35c4edf8cd6a3b966f3fc54c6654832dcc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOPAZ0404070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c47b231d8e79df909fa638133ba5f680629169b3e2344f888f48f74abafdc84. 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/NOPAZ0404120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f40c8f3888f543a566788c0f54f5a9367fa49996f6f7261839b033f1672352. 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/NOPAZ0404140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e762811929d9e3b44b097fd7d9243db2b380cbb79b5bc829fa78fc7db2296c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NOPAZ0404150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb35f80a26daa9585d0864343593ed40820f90b67a0c0214ede4e38a2aafc9a. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/NOCMC2301010.
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 0xa59fc13e04ff27c9d8c63d401f8f9519eada805ca1afb38d5b98ee54ae1bdf22. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NO2T81900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5983472ebd809911587a1af932b9766fd0166cc3cf27bc31e8d3c97f36dd50c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NOPAZ0404110.