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 0xf061ff045245f99a9e0ffd90468466d8d530e9bc3fd3aa32d08107d7d9bbd97f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bc16925-784a-43a9-bfff-c7a22e1f5f9c.json and https://artists.proofprofile.net/proofs/artist/0bc16925-784a-43a9-bfff-c7a22e1f5f9c.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 0x20077b50b809196c0c5064797b2a2fadcf6622c76fcd6441517596bf30443bcb. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNWV2572950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1421cb2bb50546002f81b152b7c594dcb2d815899df985fb92e6fbfe1cdd39c1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWV2572951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fd4b293b682e826dec459fa6e36ff1ed639988ea50af2ed2f2d7dd6fa300f1. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNWV2572928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639927a72160b0c4f5c74f87f9510d1bad02dd0ab31b8fdfa6a3a1daed13f1e0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWV2574364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13779f77cccc3cac2e1aacb2d1a94dba7af2801df4f81ee10db3eb04e534fdff. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNWV2571410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58551cfee376b138b70c3790afeb11ebcb09f930a45519fe6b0b11557b96deb1. 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/QZNWV2574353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847bf7701980eff4d46ca98d030d79c73b17a3bef1bc75e1c5e27b9fb91a9b7a. 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/QZNWW2565671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f39022108f65f1376abe76a1225879842b0e7b75eda8e68d941a94447e96a2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWW2565633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87feb55352119cec9138455459db3b20ba84dbd3e9e16742a1dc2ffe4c0fa443. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNWW2565648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d1d6a242ad78098a3059b9d0d44e080c025ed1da7f342e964eb324af003b24. 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/QZNWX2552747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa6df670acdd432f3af07d57f6b5524824c95da1bbfdc7b909f96c8636f68be. 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/QZNWX2552780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f3a7f5bb25858786a08ac738763f8d172570dcd987a1846b0860a6e87ad658. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNWX2551366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58c181bc88a2de68b9ddd62c193ba5121f289612e6b71d7e95ea9872616b8d1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWX2552750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348142efad970b250dc8b8b31ca915ceebc6de633e1fbebf1abd90fa16c14fd2. 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/QZNWX2552778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba35d26781f2fee822bd5689be74ef5438d2532be0f7683f0bdc3ac6e49d4a84. 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/QZNWX2552755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe81d7f4008a76faa082a4887176147d457569febce549907f18ffdc1aaa8024. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNWX2552773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345689ed2944f1fdc8ddbfbc87cb92e40483b7643aa3c55f05d31ed069794d97. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNWX2552782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7eaaac580716fef81b936945b76407d3178c7fab9861ea38f7a050335b35c4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWX2552752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a39843b17207f81eaba208ce2d78d19bf29d9f5e6df3b1023c54bf0ed4a072d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3FG2516084.