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 0x3738a58a1019ce6380acf8007c84164474d123049a2313757d8fce1115e6a6ed. 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/02a18d47-9f07-4fa3-841d-0debc87cb009.json and https://artists.proofprofile.net/proofs/artist/02a18d47-9f07-4fa3-841d-0debc87cb009.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 0x34cd01e64791df6bc35f1e19d4cfd4c485f6c81ba4b7c8b5f21a6141f8203da0. 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/DELJ81739744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d1b569dc46e6356667578b32c44983dd3296aaf285fe2439dfeb1825fafa39. 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/DELJ81739746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd5a1335a619ec8c15bedcde218a3f12101634cf06b631ec85b65597bb9047f. 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/DELJ81739747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac3f2533f254a30e0e753f2e69abf8735aedde7d8602a71af8fa5b9a2370b76. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/DELJ81739745.
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 0xb40a436d0a16f5a91d8d74891d7a45477bc4fab91a43c4d3a6ab51d327ca27f1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DELJ81739748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322aeec3dad6234e2ef2f3e60bfe8268ceda5836f118f62e03d20b259e376bc9. 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/DELJ81738468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe656beea1024a5dbdec80c74bd2f24b386e7bb3eed1fd95a0391a6e51cae1a4d. 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/DELJ81738469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd70fb7186ca93a2f658f117c907603444939ddefa42e55cb3808ed0b81eb88. 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/DEXS81900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7705892a4532c469b4b1abdc389c88f53fa54c300b4850311bb4217be41846. 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/FR2X41749630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5148df4cfed4bed91e60fc73915742222980f9ee5706ace8e1fdadeef77f568. 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/DELJ81812890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58445c7c7b0d59073bbd5a5e96d4109836de9722d12ed61838ea5c257964687b. 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/DEXS81900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10287b4d272e397708abc30aad1cdcdd4d1554d55357b38a34e02f18e6159631. 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/DEXS81900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b8b7859bbbfd03f5574efc957f0c74592b9f07f508ee822968122e66b9b9fe. 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/DEXS81900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1695e2c737a29e2128add5f4c0453ee1f7bfcf1c7612e592973ae1b2e201bf0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEXS81900099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10287b4d272e397708abc30aad1cdcdd4d1554d55357b38a34e02f18e6159631. 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/DEXS81900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58445c7c7b0d59073bbd5a5e96d4109836de9722d12ed61838ea5c257964687b. 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/DEXS81900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f54c11f7f8fbeb228b6f3d213f460ee6859fe12720ba6cd7ddb9729133e941. 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/DEXS81900074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69967c6bc54dc705193d7e4a37752019ec62da5e13a4706520cede746a4087cc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:27:53Z), 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/DELJ81733057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69240744207fa2880f5349c2be95e202717389f3b5dcb646552846757895162b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEXS81900013.